One of those little pieces of wisdom that will slip by you if you aren't paying attention:
If you carry a pen in the pocket of your shirt, it will leak.
It's funny to me, 'cause it still hasn't sunk in for the person who told me that. At least, he still carries pens in his shirt pockets and still has shirts that have ink stains on them. Although, lately he wears more T-shirts and just clips the pens to the collar. I guess that's the compromise.