I worked for Barnes and Noble here part of my training went over how to care for the books. Sunlight and air are the worst enemies, so if you're adament on keeping them perfect, a bag with the air sucked out would be best. Regardless of how you try, the books will still wear a bit.
Also, they've started printing books here in the last few years on new paper that's a bit thinner and doesn't get stale as much or as quickly. You see it a lot in the paperbacks. Hopefully they'll keep evolving the idea until they can find a paper for all printed books that helps slow the process if not eliminate it. The extremely porous hardcover books are the worst.
Though it probably sounds strange, I love the smell of stale books... Something about them just...