A little act of kindness I try to do is the few times the wife and I have gone out to eat, I don't just tip the usual 20%.....I've given 50% or even 100%. I know these waiters and bus staff have had serious reductions in hours and tips, so it's a little thing I try to do. Same for deliveries. Always much more than I normally would've and I teach my kids (18 and almost 15) to do the same.
Dan