1. Store your guitar in its case. We have studied this extensively and have found that the case will shelter your guitar through many extreme conditions. I realize that guitars are beautiful and that you want them readily at hand, but a stand or wall hanger is not the best place for them to live unless you are humidifying the whole house. - This does not work in a country where you're facing 80% humidity in the shade all year round. In that case, best place is the reverse: out in the open, but away from sunlight.
4. Learn to “read” your guitar by noticing sharp frets on any guitar—electric or acoustic—and low action on your acoustic. These are signs of drying wood. When you see this, put the guitar in its case and give it a dose of humidity. The sharp frets will go away. - Having bought many guitars from temperate countries, they usually have sharp frets when I buy them, which is usually in the winter. However, after bringing them home, a couple of weeks later, the neck grows larger than the frets, so that goes away.