Ditto keeping it dry and out of the sun. Also keep it away from bugs like wood eating ants and temites. If you see little things like sawdust-covered dust bunnies in your storage, check for wood munchers.
I keep different woods in heavy- duty, clear plastic bags so I can see if critters have gotten in. And I label them because I'm not good enough to tell them apart sometimes: particularly if the bark's gone.
Here's the link to the same question I asked awhile back:
http://forum.cookshackamerica.com/cgi-bin/ultimatebb.cg...f=20;t=000374#000000 FWIW