Thanks for the links, but those aren't it. I'm familiar with that recurring tidbit, but the post I am thinking of, I believe, contained more of an encouraged heuristic; something like, "If you're finnagling over a decision and think you'll end up on one side, at a certain point, you should just get it over with and actually go to that side."
As I was thinking about this, I thought it might have been in The Proper Use of Doubt. While it's actually close, it's not what I remember. The quote I'm looking for would have embodied something kind of like this:
Eventually the cost of searching will exceed the expected benefit, and you'll stop searching. At which point you can no longer claim to be usefully doubting. A doubt that is not investigated might as well not exist.
Maybe I'm just making things up in my head!
No, I remember it too. It was something about a survey of students; of the group that could say they hadn't yet decided but would probably end up doing course A, almost every student chose course A. So the message was something like if you can guess where you're probably going to head, actually you've pretty much made the decision.
Followup to: Don't Fear Failure
In the same theme as the last article, I think that failure is actually pretty important in learning. Rationality needs data, and trying is a good source of it.
When you're trying to do something new, you probably won't be able to do it right the first time. Even if you obsess over it. Jeff Atwood is a programmer who says Quantity Always Trumps Quality
The people who tried more did better, even though they failed more too. Of course you shouldn't try to fail, but you shouldn't let the fear of it stop you from tyring.
I wouldn't go as far as to say that quantity always trumps quality, but where the cost of failure is low lots of failures that you pay attention to is a pretty good way of learning. You should hold off on proposing solutions, but you also need to get around to actually trying the proposed solution.
I'm normed such that I'll spend more time talking about if something will work than trying it out to see if it works. The problem is that if you don't know about something already, your thoughts about what will work aren't going to be particularly accurate. Trying something will very conclusively demonstrate if something works or not.
Note:
I originally had this as part of Don't Fear Failure, but that post got too long.