I found this awesome website last year (Swap Bot) and it's seriously SO much fun! Basically you sign up for any kind of swap you want. Some are emails where you can swap recipes, song lists, a letter about yourself, etc. Some are flat swaps like postcards, a sticker sheet, a sheet of clear stamps, or a large package! Where you fill the envelope with scrapbooking supplies, ribbon, sewing supplies, basically anything you could think of.
I had some personal things going on shortly after I joined (and had an AWESOME rating) so it went down a bit but I'm trying to get it back up. I'm now back on and ready to swap again! I even created my own swap last night, just an email one but still!