It's far too easy for me to burn a few hours digging through Wikipedia hyperlinks and trawling through yards of text. It's a very fun way to gain cursory knowledge about possibly obscure topics, and you can find some pretty bizarre stuff if you know where to look.
Leaving anonymous love letters, made up missed connections, public service announcements and more around parks, malls, etc etc. On paper stapled to something is preferable. Your community is dying and you can save it with a pencil and paper. Or ink and a printer, if you're technically inclined.
