Makes me feel good inside when I help someone. I firmly believe in what goes around - comes around, so some day if I'm in need I'll be helped, too.
I once saw a homeless man begging for food in McD's - and one table full of men started complaining to the manager. I invited the old guy to sit and join us, and as we were leaving I went up to the table full of men and told them to look up the meaning of the word compassion. They didn't have a single word to say to me.