I may be going overboard with the ideas here, but I think this is actually a good one...
Maybe you could bookmark a topic so you can find it later without having to sort through search results or looking through a bazillion topics... (Yes, I know Google Chrome and all the browsers have a bookmark thing, but you probably wouldn't want to clutter it...) Like you can have a tab or something that says 'Bookmarked Topics' and under that all the topics you bookmarked... is it a good idea?