If you’re close to running out of gas and you have the time to stop and fill up, go ahead and do it.
It’s tempting to think: “I’ll just do it tomorrow,” or “Ew, it’s cold” or “Gee, I’d rather not miss MythBusters,” but the fact is that if you don’t fill up now, tomorrow will be
and you’ll be running late for a meeting
and you’ll have just painted your nails.
(And you’ll be that much closer to being stranded on the side of the road.)