It's time to rumble through your cupboards to de-junk and make some dosh. The obvious place to sell is online auction house eBay* but there are other options too.
How much? Dedicated sellers make £100s on the side.
Pro Tips: Wait for eBay '10p listings' days. This way, even if a few things don't sell, you won't be out of pocket - and you'll maximise the profit margin. Best of all, you get to enjoy a relaxed, clutter-free home.
Try grouping things together, so if you're selling baby clothes, rather than listing each item one at a time, sell them in bundles of similar sizes and quality. People tend to prefer buying in bulk.
Books & CDs: Amazon is probably the best option for selling old books, (unless they are especially rare or collectable) since you need only type in their ISBN numbers and a short description; Amazon will provide full synopses and reviews of most from its database.
If you're listing a few in one go, this can save you a lot of time. Plus, Amazon marketplace listings last 60 days, and relisting books which don't sell's free, so you needn’t keep spending after the initial fee.
Listing CDs one-by-one on eBay is likely to get you the most cash, but it'll take you some time.