Restoring vinyl ?

Ah the follies of youth-I never looked after my vinyl over the years-my mate has several albums I borrowed with footprints on them and well I even left the turntable lid up one time on a rare sunny day and turned an lp into a bowl with a hole in it.
Anyway I'm now selling off parts of my vinyl collection-any hints or tips on restoring vinyl?
I'm just wondering if the vinyl guru's here know any cheap home made tricks..........and yes I know I'll be left forever to regret not looking after it especially since a fair bit of it would be valuable if it was in decent nick.