It may be worth noting, if everyone is not already aware, that guitars actually improve in sound quality the more they're played. The more minutes and hours that the wood spends resonating, the more, or the better, it resonates as time goes on.

Second-best to playing, I've heard recently, is simply exposing the guitar to musical sound. Instead of keeping your instrument in a case, get a stand and prop it up facing the speakers through which you play recorded music.

Even TV sound is better than beign muffled in silence inside a case. My guitar lives in a stand next to my easy chair, in front of the idiot box. I certainly play more often now than when I used to keep it in a case ~ I'll mute the TV during commercials and play a few licks. For those short little stretches of 30-120 seconds, I don't play whole songs, don't even play anything I know very well ~ I'll use that time to get in a few repetitions of some new lick I'm still trying to learn, building muscle-memory in my fingers a little bit at a time.