Well, I use other people's reviews, Takawiki summaries and any scripts/existing material it was based on at first. If that's not enough, I try my best to interpret what goes on. It's why I'm more into the more musical ones too, and why I don't watch the shows so often anymore because I feel I need to concentrate.

You have a perfectly valid excuse. Besides, it's not like you need a big collection, just the ones you like best. If I think I may watch it again I keep it just in case.