Organizing:
Avoid scattering storage space. Try to keep things in the same category together as much as possible.
Store items so that they can be retrieved individually, without moving others. Don't stack anything.
Avoid buying things that store other things, like DVD towers and wine racks. If something can be stored without an extra container, it should be.
When you buy new stuff, unwrap it and store it immediately before it can be forgotten.
The best way to store bags (including handbags, duffel bags, purses, etc.) is in another bag.
If you have a purse or duffel bag, empty it every day so things can't accumulate in the bottom.
Keep things out of the tub, sink, and shower, even shampoo bottles and washcloths. It's easier to keep everything clean and mold-free that way.
Use the top of the bookcase like a personal shrine, for items that inspire you but don't need to be retrieved.
Use the inside of the closet for things that use up floor space, and for things that you enjoy but don't really belong in the open (anime figurines, justin bieber poster, etc.)
Don't underestimate the "noise" of written information, particularly if written in your own language.