Two pointers if I may:
1. Leave the guitar out in view. On a stand by the T.V. works. Grab it during commercials. Locked away in its case; it just won't get played.
2. Tune your guitar at the start of any playing session. Out of tune guitars just don't sound good and anyone in earshot (including you) will become annoyed. Nothing like a nicely resonating G-chord to perk you up.