Organizing!

So I'm attempting to organize Abby's room right now. Well, actually I am attempting the whole house. Anyone have any good idea's for me. How do you store your kids clothes that they have outgrown? Do you separate them by the sex of the kids or by sizes or both? Also what do you store them in. I've been using the Rubbermaid totes for a long time, but an wondering if there is a better solution.

Also, I going to tackel the kids art stuff someday soon, again! Anyone have any nifty solutions that have worked for that stuff? Right now I have all that in some small Rubbermaid containers, oh and playdoh, how do you organize that......I could go all day. I need idea's people!