My wife had what I thought was a great idea: a diary for twitter updates.
When my son was born I tried writing a little bit about each day; just regular stuff that happened each day so I could look back on it later. Fun at first, but became kind of a burden to keep up with it and it eventually went away. Tweetary solves this problem for me. I’m already on Twitter, so now I can just record something privately if I want. Plus, the brevity Twitter requires will make it more likely that I’ll continue to use it. Yeah, you could just email yourself, or start a second account, but that wouldn’t allow me to try out the twitter-auth plugin/gem and mess around with the Twitter api, which was the other motivation. The plugin is great and the Twitter api is very straight forward. The whole thing took only a few hours.
It’s free, and you can export whatever you send there, so there’s no risk of losing it. Try it out and see what you think.