An increasingly popular way for students to make money is to fill out online surveys in their spare time. Research companies are always recruiting new members to answer surveys and test new products.
For a few minutes of form filling, you can make a couple of quid which is paid as cash or in rewards. You can make up to £3 for some surveys!
A few good ones to try are: Toluna, Pinecone, IPSOS, Vivatic, The OpinionPanel, MySurvey, Valued Opinions, SurveyBods, Global Test Market, Hiving, PanelBase, Harris Poll, iPoll, Opinion Outpost, YouGov, New Vista
Also sign up for Swagbucks.com which rewards you for surveys as well as simply surfing the web, watching videos and playing games.