[jseliger]

Have something I really, really want to do, and do that thing until it's done. Sort of the top idea in your mind: http://paulgraham.com/top.html.

[sdegutis]

This is difficult when you have 3 things that all tie for #1, and since they need to be sorted into #1 through #3, that sorting isn't stable sorting, so each time you mentally sort it, they might end up in another order. So #1 changes all the time.

[bbcbasic]

If they tie just make an arbitrary decision. E.g. pick the least fun one. Or more analysis on which should win if that is appropriate.