11. Sell your clutter on eBay
Take this quick test: You're at home. Open a cupboard. Look inside. If it's full of clothes you haven't worn, or 'good ideas at the time' you haven't used, for, let's say, three years - you don't need them. So why not sell them to someone else who does? For fans of the understatement: Ebay is quite well-known and popular now. The great thing is you really can flog any old garbage - for a commission. Tip: you may want to buy a few items first to build up your rating as a respectable eBayer before you start selling.