How do you store a whole lotta LP's?

Bookshelves, 12" deep, w/ adjustable shelves. Dividers are non-corrugated posterboard 13" deep, labeled A, B, W-Z, etc.

I think IKEA http://ikea.com has some great choices for storing LP's from the Bonde unit mentioned to IVAR, etc. Check it out.

I got cheap, appropriate sized book shelves from Staples. I only go three tiers high because I'm afraid my floor won't take the weight.

When I was single, I used one of those metal shelving units that are meant for garages - very cheap, holds over 1000 lps. I kept a sheer curtain in front of it to provide a little esthetic improvement and dust reduction.

Here's IKEA shelves used for records:

http://www.audioannex.com/showthreaded.php?Cat=&Board=4&Number=9855&page=&view=&sb=&o=

These are custom record shelves:

http://www.audioannex.com/showthreaded.php?Cat=&Board=4&Number=9838&page=&view=&sb=&o=

I could be happy with either one ;-)

Muzikat - Sorry to take so long to respond. I don't use anything to keep the records from sliding back. Since I have the shelf against a wall, and I use 12" shelves, there's really no where for the record to go. On the other hand, the CD's would slip back. My solution was to have some 1x2's (I 'splurged' and spent the extra $10 for furniture quality oak that matched the look on the shelf best) cut to appropriate widths at Home Depot. I used poster tack to affix the bars to the shelves so that I could remove them if I ever decide to use the shelving for something besides CD's.