[michaelborromeo]

I think there's economic theory that relates to this idea: discounted future utility.

e.g. $10 is most useful right now, slightly less useful a day from now, and much less useful a year from now. This is for real reasons -- inflation -- and psychological reasons -- I'm more excited about getting that $10 now than in a year.

There are equations for this stuff but it's been a long time since college.

You can replace $10 with other "goods" like time, sleep, relaxation, etc.