Organizing : Key Item
This may seem funny and of course it is common sense to have one. But you will need one while organizing and it is always good to have close.
In this step you want to have your trash can, and a line of boxes. Each with a name on them. Give away, fabric, paints, books, etc.
So my suggestion is to go through everything, and find it a permanent home. It will make your projects go faster if you know where things are. Good luck
Here are some pictures of this concept. :D