Keep your instrument in its case when you are not playing it. If you don't have a case, get one asap. This ensures protection from heat, humidity and bumps.
Never leave your instrument in an unlatched case. It may fall out when you or someone else picks it up.
Do not play your guitar at temperature or humidity extremes. Caroling in winter in cold low humidity or playing at picnics in hot high humidity can often have heart breaking results. Do not leave your guitar in a hot or cold car, even if it is in its case. These extremes will cause damage such as cracked wood or finish checks (cracking) is not warranted.
Only use a lint free micro fiber cloth to clean your guitar. Only use a small amount of water on the fretboard if it is absolutely necessary.
Use a soft cotton cloth to wipe down the strings and body after you play. This will increase the life of your strings and keep your finish clean.
Belt buckles and blue-jean rivets will scratch the back of your instrument.
Modifications such as adding permanent pick-ups should only be done by reputable guitar shops. Do not attempt them yourself, as you will void your warranty. You can use 'drop in" or non-permanent pickups to your heart's delight.
Never let your instrument’s wood get wet.
Change the strings one at a time, thus causing a minor change in string tension. Look inside guitar to find the recommended string gauge. Do not use a heavier gauge than is recommended. Lighter-than-recommended string gauges will not likely hurt the instrument but they may affect the playability and tone. Specialty strings sometimes put excessive tension on your instrument. These strings may void your warranty. If you prefer to use “phosphor bronze” strings, I recommend that you light gauge or lighter.
Change strings often. Any guitar with new strings will often sound better than a million dollar guitar with old strings.
Never tune strings above standard pitch.
It’s not necessary to lower the pitch of strings when storing your guitar for a short time. You might consider lowering the pitch a step or two if you are storing it through a season change.
Use care when removing the guitar from its case. Case latches and flanges can damage the finish.