It only takes 5 minutes to do, but I always wait until I can't bare it any longer. Last night I was cutting a bunch of plywood for some shop cabinets and decided I couldn't stand the tear out I was seeing. So when I was switching from dado to combination blade took the time to spray it down and brush away the pitch and resin. The not so surprising result was perfect cuts with no tear out. I really have to stop doing this to myself!
Thinking about it today I realized I do the same thing with sharpening chisels and plane blades. I've gotten into the habit of sharpening them after every project so they're ready to go, but in the middle of a project I'm so reluctant to stop and sharpen even though it'll end up saving me time.
I'm sure there are more things I shouldn't put off as well. But that's my list for now