The past week or two, there has a been a lot of chatter about archiving your Tweets into text files. [Dr. Drang just reminded me of this when I saw this follow-up post from him](http://www.leancrew.com/all-this/2012/07/archiving-tweets-without-ifttt/). I’ve used ThinkUp and implemented one of the IFTTT methods, but I have found Cue (formerly Greplin) to be the best way to find old tweets.
I like that I can do a simple search on any device for a tweet and find it — it’s a pretty simple service with a decent iPhone app. I am not sure what they are trying to do with the new Cue service (since I only use it for Twitter), but the search functionality of your Twitter account works really well.