#1
Martin has a great faq on care of intruments. These would apply to all acsoutics, so definately worth a browse.

Humidity, temperature, travel, airline travel, cleaning, bridge care, and even how to change strings properly are all covered.

http://www.mguitar.com/catalog/PDF/Care&Feeding.pdf
2001 Gibson USA Les Paul Studio Black/Gold
2008 Alvarez-Yairi DY40C
2004 Taylor 310
Marshall AVT275

Ex guits 2002 Ovation Elite, 1995 Seagull 12 BC Rich Gunslinger Snakeskin Various Yamaha Various Sammick Epiphone Les Paul, Epiphone ES