Let's get to it, shall we?
Evaluate the storage space. As you look at your empty closet you'll need to also look at your pile of items to be stored and evaluate whether you need shelving, hanging space, baskets, etc. Take full advantage of vertical space in closets that lack depth. A closet storage system doesn't have to be big or elaborate. Even a couple of carefully placed shelves and multiple height rods can double the usable space and make a huge difference.
If shelving units are needed, consider recycling items from around the home before purchasing new. Shelves or drawers can be created with plastic stacking drawer-units on wheels, stacked milk crates, a book shelf, extra dresser or wire/wood closet systems from home improvement stores.
Packing the closet. The goal here is to create order. Based on real-life needs, most frequently used items should be placed where they would be easiest to find and reach. The bottom level can hold smaller 'quick-grab' items organized in baskets or drawers where you can see all at once. 'One-grab' items reside at the top of the closet.
Labels. Handwritten or computer printed labels make it easy for items to be returned to their place after use. Take a few minutes to tag the shelf edges and list contents of drawers and baskets. Add drawings or graphics to the labels if non-readers (small children) will be using the closet. It's a great way to help others (even little one's) get into the habit of returning items to their place! Set up your closet well and you'll be better able to keep it organized in the future.
Every item 'has' a place and is 'in' it's place.
Now, that is organization!

