Not treating people in such a way because they've done what you have perceived to be a good thing but because, by and large, everyone, everywhere is deserving of your kindness, no matter what it is they have done, are doing or will do. Letting bygones be exactly that and not pieces you can hold on to to use against someone later and hit them below the belt with it. Not giving a "gift" to someone because he or she has done you a kindness, but because you want to and need to give of yourself ... and because you most certainly can. Always, always, always act "as if" and let the cards fall where they may.
I guess I'm just picking pieces up along the path. Life's pretty good.