As far as displaying my collection, I don't really display them. I do keep them neat and organized though. When I get a lot I put them into stock books right away to protect them. Then as I have time I put the stamps into my Lighthouse albums.

The top is U.S. - Left side: Mint U.S., Middle: Disney album, Middle: U.S. Mint, Right: used U.S.
The bottom is WWII era - Left: over stock, special cancels and misc. Right: Mint WWII Germany and occupied countries and Feldpost covers.