sunroof rattle - get it fixed
ur driver seat - tell them to fix any loose bolts or screws or watever
oil filter change - goes without saying
clutch - tell them to lube the joints (if u have a manual)
brakes - tell them to lube the joints so that brake doesnt squeak or creak

this is what i would have told the guys to do when i had my 20K service (im on 22K now)
its better to nip the problems in the bud rather than u goin back to the service centre to get a problem fixed