List-It is a simple app that lets you create as many lists as you like, then add items to those lists. You can then cross-off items as you do them, or delete them entirely. Looking at all those crossed-out items should be motivating, right?
You will need to create an account first, but don't worry: List-It does not send out any emails other than to retreive a forgotten password.
I built this app to finally start putting together all the separate and varied pieces I had gathered and encountered while trying to learn Rails. Even though it is a simple app, I learned A LOT, and A LOT goes into making even a simple app. Database modeling, restricting access through controllers and views, testing, UX and design, and building out the front-end all require attention to an awful lot of details.
So, make a list and start getting some stuff done!