In 2004, a chap by the name of Taylor McKnight started taking one picture a day and posting the photos as a way of chronicling his life and what was important to him. Over the year, he also found that he become a better photographer. The classic photography website Photojojo published his post about the process in 2006, and the rest is history. There are now thousands of photographers who are shooting their way to better pictures one day at a time.
Developer Alvin Yu has made it possible for any iPhone owner to create their own Project 365 portfolio through his free Project 365 app [iTunes Link]. The app is quite simple; launching Project 365 shows you a monthly calendar with a blank area for each day. Tapping on the date allows you to add a photo, either by taking one or adding it from your photo library. Once you've chosen the photo, you can add a caption, then send the photo either to an email address, to Facebook, or to Twitter.