"Another quote (re-translation from polish edition): If you come to the conclusion that one of the projects has no chance of implementation in the next few months (or longer), move it to the list 'Someday / Maybe' "
In my opinion this rule is not so simple as it looks. If you focus on too many projects at the same time you won't achieve anything or it'll take a lot of time. This may result in a lack of appropriate motivational stimuli and be a burden on the psyche. Balance is necessary. Perhaps the list of current projects should consist of short-term projects and only a few or even one long-term one.
Can I ask approximately where in the book that's from? It's hard to search for a translation of the text, and I'd like to see the context.
I would agree that you can't *focus* on too many things, but again - DA semi-routinely talks about project lists with over 100 projects. You don't have to be *focused* on every thing on your project lists, but you *do* want a menu of "next actions" you can take to move any commitments forward. And of course keep in mind that "next actions" can exist without projects, and projects can have multiple next actions - so one's "next actions" lists for over 100 projects might have significantly more than 100 items.
Without seeing the context for that quote though, I think the key with the "no chance of implementation" line is that if something *can't* move forward, you shouldn't *try* to move it forward. But that seems to be more a matter of just acknowledging reality, rather than determining to move something you've committed to achieving to a list whose purpose is to hold items you *might* do later.
Just a couple more quick notes from the appendix, again from the revised edition of the book:
“Horizon 1: Projects—Anything we’re committed to finish within the next year that requires more than one discrete action step. Includes short-term outcomes such as “Repair brake light” and larger-scope projects such as “Reorganize Western Region.” The critical inventory of the Weekly Review.”
“someday/maybe—A common category used to organize projects and actions one is committed to review only for potential action at a later date”
I think the key there is "potential action". If the action is required, it's not really "potential", is it? For required actions that one is punting out into the future, with no intent to track or take action on *now*, that would seem to be the purpose of a tickler file (or deferral methods in software).
Think about it this way.
In an ideal world, if you know now (in January) that you're not going to do anything about a project until June, but it's required that you take action in June, it shouldn't be on a Someday / Maybe list. This is because reviewing that item on your Someday / Maybe list will be taking your mental attention many, many times between now and June.
So you make the decision about what/when, and tickler (or software defer) the action.
Whereas if you have the same project, but whether or not the project even comes to fruition depends on half a dozen other factors, and the timeframe might even be questionable, that would make sense to go on a Someday / Maybe.
DA talks about this in one of his audio talks. Basically he talks about looking through something like a catalog, seeing something he wants, and deciding *not* to buy it just yet because he's not sure if it's an "impulse purchase" or not. It's something he definitely wants to buy, at least now - so it doesn't go on a "Someday / Maybe" - he puts it in the tickler file for a couple of weeks out, with the intent that he can make a final decision at that point in time. The idea is that he'll be smarter about that purchase in two weeks, so he can make the decision then.
It seems like as much as possible, definite action should be scheduled for definite future dates - and "Someday / Maybe" should be reserved for things where the taking of the action is uncertain and / or optional.