manny123 - 5:09 pm on Dec 11, 2012 (gmt 0)
I agree with claaarky. I leave my redirects setup indefinitely. Spend some time on Matt Cutts youtube profile page and you should find a couple of videos that discuss redirecting several similar pages into one main page that best represents that topic. The point being, he seems to endorse the idea of consolidating pages into one great page about a topic instead of 5 so-so pages about a topic.
This may come across as blindingly obvious, but when redirecting, try and only 301 redirect once. For example, if you have pages A, B, and C that are all about the same topic, crown one of them your king (say, C) and then redirect A and B to C as opposed to redirecting A -> B -> C. Cutts has warned about chaining redirects before.