The first attempt at nail polish organizing, I got a small spice rack at walmart. And that held up pretty well and it was great...until I got more polishes =O
Now I have them in clear shoe boxes that you can get at the dollar store or the container store, walmart, etc, and I just line them up by highend vs drugstore. And the boxes sit on my printer ^_^
It's great because you can see what colors you want when you take off the lid, plus the height is just perfect for nail polish =)
I know some people organize theirs by the actual nail polish rack you can buy, I think it retails somewhere around $60 (without shipping) and that's too deep of a reach in my college bank acct for =O I spent $3 on the clear boxes in the dollar store =D which is much better
Good luck!