I had a nightmare last year, missed the basketball and futsal trials, got through football trials then strained my quad pretty bad which put me out until November.
Take a look on Lincoln SU's website there's a list of all the teams/societies on there. You may want to pick only one or two though because last year most of the trials were in freshers week. I can't decide between: basketball, futsal, football and handball, wouldn't mind getting back into gymnastics (can you see how this many trials in one week is a bad idea!)
It's worth knowing also that a lot of teams have 'competitive' and 'social' teams depending which you prefer!