The following is quoted from the Meta-Chanics post for Cranium Rats on my Blog:

Tokens are finite, generation of Tokens is not that easy, at least not for players. When players spend Tokens they usually go to the Enlightened, and when he spends them they usually disappear. Using Tokens to exert mechanical influence “Removes” Tokens, using them to exert story influence gives them to someone else, who may end up using them against you. This would make players hoard their tokens, thus the “Use them or lose them” bit, which stops them from sitting on their asses passively, which leads us to our next point:
Game Length is helped along by Tokens and thus fulfills the movie/TV episode feel I want the game play to have! If you have a Medium session it’ll be followed by another Medium one, where people have Tokens, use them, resolve Goals, use Tokens. When you have a Short session it should be followed by a Long session and then another Short session; At the end of a short session players are left with unused Tokens so they will scramble to set them up in the only way they can “keep” them: they will set up new Goals for themselves. The next session should be long, so that players would use up all of their given Tokens, would have to resolve their Goals for more Tokens and then use them as well. The next session should be short as well to let players set new Goals.

The idea of limiting session length mechanically, in such a way, somehow does not appeal to me at all. But what is your reason for introducing rules intended for it?

Usually, when I want a gaming evening, I'd rather play as long as everyone maintains interest and/or has time left. Fixed play-time limitations like 1h max in Toon or Puppetland are still fine, since this helps to fit the game into the schedule. Endgames are still fine, since they conclude the play in a meaningfull way. But this short-long-short scheme looks a bit restrictive to me, especially that you never know how long exactly the session is going to last, and it's possible that the long session will come up hen there is not enough time due to scheduling problems. It's also possible that players run out of Tokens before there is a meaningfull conclusion - and I generally prefer when a meeting has one.

What about something in the lines of "the winner of the session decides on the outcome of this part of the story" rule similar to that from Threads?

Why do it that way? I have this idea of certain session length to fit movies/TVs of a certain mode, where in one section you create more and more issues, and then at the end you go blazing through, resolving as many issues as possible in a short period of time.

Also, I see the issue of "Not knowing when a session will end" inversly!
Suppose I have a regular game night, I don't know how long the game will run, so may not wish to spend my Tokens, as to keep my options for later on, and if the session is shorter than anticipated I end up with unused Tokens, if the session is too long I will sit there without Tokens.

Whereas, this way, you control the session length. Have real life interfere? No sweat, just dump Tokens at Conflicts, or better yet, create new Goals to be explored(and cashed in) next time. Want a longer session because you have free time? Don't spend Tokens, you probably want to spend them less often anyway, as to keep your options open for the whole session.

That way, it gives you more control over the game, especially considering you choose when to use Tokens, and can choose to cash in Goals in order to get more.

Hi Guy!
  I think that this mechanic is interesting, but I think it is an artificial distinction and will be used to mean "Adventure" or "Campaign" instead of Session, the you want it to mean. It is counterintuitive. If everyone runs out of tokens in an hour, then they will just start another session. And if the session ends unexpectedly (power outage, family emergency, etc.) then the players will just as likely to save the tokens in order to continue the session the next time they meet, as they are to just throw the tokens away and start with a fresh batch next time they meet.
  Don't get me wrong. I don't think that this is a broken or bad mechanic. I just want to inform you that the likelihood of everyone picking up there stuff and going home after running out of tokens is unlikely, if there is still enough time to get some good play in.
  I think having a mechanical way to know when the "episode" or "act" is done, is clever and allows the players a way to communicate pacing desires (by their use of tokens) without being confrontational or boorish.
  Finally, the knew-jerk reaction is to think of this kind of mechanic as oppressive or unrealistic. I had the same reaction as Filip, until I stopped and thought about the real world effect of such a mechanic. The reason I mention this is to suggest keeping the mechanic, but changing the terminology to match the intent. Perhaps word it to say that each Act is complete when all the players are out of Tokens for instance.
  Just my two cents, no change please,

Hm, and then need to decide what happens when an Act "ends", which goes with what Filip said about having a Winner per session, so winner per Act, but need to consider what mechanical effect it'd have.

Hi!
  Its up to you, if you want it to have any more mechanical effect then finishing the act. I don't think the mechanic is any less effective if you change the name...
  I know you like competitive games, so if there has to be a winner, shouldn't that wait until the end? What value is there in declaring a winner before the end?

Well, there could be Game Winner and Act Winner.

Also, in more thought, this won't work. So you aren't going to win the Act? Then keep your last Token unspent, it also doesn't mesh with Tokens replenishment each session(which is there to get people to use them!).

I will give this some more thought.

Hi!
  OK, but that is not what I am saying (I can't speak for Filip), what I am saying is leave the mechanics, EXACTLY as they are. Just rename Session to Act, Chapter, Arc, Episode or some other term that denotes the element of a story you are trying to capture with this mechanic. If you look at it objectively, sessions don't have to map to a story element. And it may be counterintuitive to try and force it to in the text of the rules.
  In this way, the game play will match the terminilogy.

How would it work with Tokens being replenished between Sessions though?

Also, in more thought, this won't work. So you aren't going to win the Act? Then keep your last Token unspent, it also doesn't mesh with Tokens replenishment each session(which is there to get people to use them!).

I have an idea!

Rules above do not change, but! "When all Tokens are spent an Act is finished, when an Act is finished each Water player gets to choose: Remove 1 Mark from each Trait. OR remove all Marks from one Trait." This shows how characters "heal" or gain back resolve between Acts.

Another option is to heal all Marks but that seems too much.

An additional Act rule is: "An Act may only be completed once per Session". This is so people won't finish an Act, resolve one Goal, use up that Token and voila! another Act finished. It's still going to be most likely an Act ends when a Session ends.

Another idea!

When an Act is finished, for each character, the Dirt Aspect's player may choose to add the character a new Specialty, if he chose to do so, then the Rat Aspect's player must choose and remove one of the old Specialties.

I also thought of giving the Rat player the option to choose for removal first, but then the new Specialty is not well-thought or desired, but merely gap-fill.

Thoughts? Should it happen with, instead, or in some other formation with the above idea for healing?