If you want your guitar to last a life time then there are a few simple steps to take to make sure your guitar maintains the quality and performance from day 1 to day 100,001.
HUMIDIFIER - If your guitar is made of solid wood then you will want to buy a humidifier to keep the wood from your guitar from dying out, and cracking.
Tips & Warnings
Don't lean your guitar up against the wall. If you want to leave it out of the case than buy a stand for it. The problem is you can put extra stress on the neck of the guitar, and it more likely to fall over.