Another form of making money online is drop shipping.

Drop Shipping involves a retailer selling products, but they never actually have the products - they forward orders they receive onto the manufacturer or wholesaler who ships the products to the customer direct.

It's a bit like affiliate marketing in that you are promoting a product that you never need to handle, but it's a bit more involved because you do handle and take payment from the user. You don't pass the customer to a merchant - you are the merchant. Presumably that also means you are the point of contact for returns and warranty issues too.

Do you make a living out of drop shipping? Feel free to share you experiences in the comments section.