Why not learn a new skill? There are over 70 short courses going on at Clubs and Socs, from indian cooking to ukulele. Or want to make a quick buck? There are loads of tournaments (with cash prizes) throughout the year, from photography to the famous OUSA bake off!
There are over 160 Clubs and Societies affiliated with OUSA. So whatever you're into, there is probably another group of students that are into it too! Have a good browse through the massive list that you're welcome to join, and don't miss Clubs Day held at the start of each semester.