Not to be confused with “fuck you money” (which is the amount it would take you to be able to say “fuck you” to anybody at any time), “fuck it money” is something everybody can, and should have.
“Fuck it money” is simply a threshold, under which you make a decision to not let things bother you. This is similar in concept to Ben Casnocha’s “Ten Dollar Rule” for traveling, except that it applies at all times.
For example, let’s say your threshold is $10. If you buy some nail clippers that don’t quite work, or you get home from the take-out place with the wrong order, just say “fuck it” and move on. Don’t dwell on it. Now, if you’re still in the restaurant, or if you visit the pharmacy every week, take the nail clippers or the take-out back and make it right. This isn’t about being wasteful. But, how many times have you let that thing you were going to return sit on your desk, staring at you, sticking in the back of your mind, adding just a tiny bit of stress, for weeks at a time? For what? $7.99?
Fuck it. Move on. Stay happy and stay productive.