Almost everyone is saying hang your guitar on a stand. I never hang my guitar on a stand. When not being played, a guitar or any other musical instrument should be in it's case with all the clasps fastened. I've seen a lot of guitars get knocked over and necks broken, when if they had been in their case this wouldn't have happened. It only takes 15 seconds to put a guitar in it's case and fasten it up.
I play a 1951 D-28 Martin and it has it share of nicks and scratches but it didn't get any hanging on a stand.
I agree with all who say, "Play a guitar." Change strings as often as need, if you're not qualified to do minor repairs and set-up on your guitar, take it to a QUALIFIED person at least once a year for a checkup. Money well spent, a loose brace could be discovered and reglued preventing a caved in top. Just like keeping an auto in tune and top running shape.
But, first and foremost, play, play, play that instrument or sell it to someone who will.
Just this Ole Hillbilly's humble opinion after 60 years of hanking around the music scene.