I have been a member of Slice the Pie for a few months now and I have already managed to get enough to pay our twice.
How it Works
First you need to sign up to a free account. You can do this HERE.
Then they ask you a few simple questions about your music tastes and general interests, and then you are ready to start making money. You can earn about 4-12p per song and you have to listen to at least 1 minute and 30 seconds of each song, the pennies really adds up quick.
There are also other categories as well as music which you can review, I have completed reviews on homeware, fashion and technology as well, however the most money can be made on the music reviews on this site.