Here's a cool way to recycle those old vinyl LPs: just use them as coasters! Of course the one thing you'll have to take into consideration is the moisture, so here are a couple of ideas for you to consider...
The simplest solution is to laminate the records to keep moisture from seeping into the rings. Cut around the edges and you've got an instant coaster!
Your other option would be to place a piece of perfectly cut glass on top of the records and glue it down, but we haven't been able to find any products that fit the bill.
If you're not feeling up to the DIY project, you can easily grab some pre-made coasters from Elsewares for $20 (set of 6). Of course this won't be as personal, nor make you as cool, but they're presealed and a plastic ring around it gives it a sturdier feel.