Since Lead has already covered the organisational part, here's the technological bit. Depending on your budget and preferences, there are a few options.

- Finalscratch solution: You hook a laptop with finalscratch, serato, or similar software up to a set of turntables/CD players and carry your entire collection on it, possibly with an external harddrive.

- HD Player option: there are many different companies that are offering HD players. These players upload the music into an internal harddisc and allow you to play them back without having to carry around the CDs. Some of the more common ones are Denon's HD2500, Numark's D2 director, the Cortex HDC series, and ofcourse the infamous (and in my humble oppinion amazing) Numark HDX's. You can generally hook a keyboard up to these players to facilitate searching.

- The ipod solution: *shiver* please don't...

If you have a lot (and by that i mean A LOT) of money, perhaps you should look into A&H's Xone:3D or 2D's, but as this is more in the MIDI field I'll leave it up to someone that has more knowledge on that topic than i do to explain it. And if you're just filthy rich and aching to get rid of money as quickly as possible for the convenience of not having to look through CD's you can always burn your MP3's on a DVD (you'll be able to fit a good 1000 tracks on a single DVD) and play them back on some DVJ-1000's.

Perhaps if you give an idea of your budget i can flesh out in more detail. Also, is this just for home use, or for on the road?