Just order or print out a bunch of leaflets from Animal Aid or Viva! and put them in the books you borrow from the library. If you are one of those people who writes notes into library books or underlines and highlights sections in them, consider leaving notes such as "www.earthlings.com" or "Youtube Best Speech Ever Gary Yourofski", or "Youtube Melanie Joy Carnism", etc.
These are also the things you can write on Sidewalks and the street with a piece of chalk.
Another easy thing to do is when you are sending postcards to people, leave a bit of room for a sticker, like we did last time when we sent postcards from Germany.
If you are good at overcoming your fear of public speaking you could also consider what our good friend Sophie - a person who truly only lives for the animals - pulled off the other day in Cambridge.
Check out her spontaneous one-woman protest here: