To completely purge my bedroom, like get rid of half my clothes.
Then I want to attack my scrapspace and get rid of tons of things I haven't/won't use.
The clothes thing is hard since half my clothes don't fit and I keep planning on losing weight. :)
As for scrap supplies, I have so many and I spent so much on them I feel guilty. Granted I sell them in a garage sale so I get some money back for them, but not what I spent. I even have a sketch of my shelves right now and I'm thinking about how I can rearrage them to maximize my space and make it functional.