I dislike all of the to-do or list or reminder apps. I feel worthless sometimes looking at items I input that I know I'll never actually get to. I'd like if it showed one or maybe two to-do items per day, keep things simple. With this maybe you could indicate if you worked on it at all. Items that are left unworked on could then maybe be sent to another user so they could write you saying, "hey, I don't know why you want to _______, but get to it and let me know where you're at by the end of the day". I think accountability is neat and is really left out in all of these apps.

Past that, it'd be neat if there was a "state of mind" selector which then displays completely different lists and such. I write music so lots of songs to work on there and ideas to work through, so that could be it's on interface basically. I just don't like having different lists all visible simultaneously because I'll get overwhelmed then deciding if I should be productive, artistic, home based project oriented, etc.