Can you help me come up with a bunch of small, but good deeds?

I’m looking for a bunch of small things I can do to make others just a little bit happier. Today, I hid some coins in a schoolyard while out on a walk. Yesterday, I left a chocolate bar in someone’s letter box. That kind of thing.

Background: I’ve been depressed for a while, and I’ll need some help feeling happier in the next few weeks. I’m going to try out therapy – but like a true geek, I researched the science of happiness. Helping people is very high on the list of things that make us feel good, so here I am.

Any ideas, my smart jellies?