I color code mine, like all the orange labels go together. Just looks nicer, even if the games/genres themselves aren't categorized that way.
SHUTTLECOCK OR SHUFFLE OFF!
I liked coldb33r's solution, so I went out today and got some business card holders. The 4 row holders don't fit. I just assumed any business card holder would work, but stick with the three row ones.
OMFG Vestcoat, you have PCE GAME :O
I devised a system: