Sign up to Univox and complete surveys to earn Amazon vouchers! Just click 'GET FREEBIE', register for an account by filling out the survey on their website and confirming your email. Then just check your email for online survey invitations and other market research opportunities.
Emails will state the type of survey offered, the topic, the length of time for completion and how much they pay. Once you have accrued enough points, you can start redeeming them for gift cards such as a £17 Amazon Gift Card.
You'll even get a £1.50 welcome bonus to get you started!