Can You Write Reviews !
Do you consider yourself opinionated ?
Plenty of sites out there will pay reasonable money for your opinion.
If for example you've tried a product, been to a theme park, or used a service that is listed on certain websites, you can get paid for writing a review describing your opinion of the subject.
Visit the site CIAO @ http://www.ciao.co.uk, and read up on the 'contribute and earn money' link, in the centre of the page for a working example. Membership to this site is FREE, so if you're interested in making money in this way, CIAO would be a good place to start.
Plenty of other sites offer a similiar service, and its always worth registering to voice your opinion on as many as possible to maximise your earning potential.
There are plenty more sites out there that will pay for your products / service reviews, so its worth shopping around and signing up with a few to earn some extra cash.