Off the top of my head-
You could make some money from selling old unwanted items online or at church etc. Find out if there is a local weekly car boot sale going on as well. You can sell stuff like books, clothes or toys. Alternatively you can sell your old games, dvd's, books, toys and clothes to family or friends for a low overall fee. Another good way to make money fast is to fill out surveys online. You can even enter a public radio or magazine competition to win a huge amount of prize money. What about a famous TV contest? If all else does not work, try entering a quiz show on telly for huge cash prizes too.