Agreed. And thats where I can see the value. However I'd want something a lil more. For example, perhaps 'things' would keep coming back for say 30, 60, 90 days. You complete the thought and turn it into a habit and now you're good, so you can archive it. The more you turn into habits the better visual feedback you get.
Another idea: Add video to this. Help ingrain the lesson learned by doing a full-blown reflection on what it means to you and why its important. Also, to see yourself to yourself to-do/NOT-to-do something every so often could be interesting.
BTW: I have a folder in Evernote for things like this, I just dont check it that often, but a system that could automate this and push things to me could be interesting. One step further: sharing. Famous people could share short videos of their 'lessons learned' and you could subscribe to their lessons until you complete them as habits (remember not everything will turn into a habit though).
The iPhone app has image uploading right now but now video yet. We've been toying around with the idea of some sort of followed hashtag system where you could see what other people are thinking about. We just don't want to accidentally end up as a twitter competitor.
Just a few thoughts, hope it helps!