When you are done with an item, just tap the box next to the title—this will clear the item from your list.

Things is the ultimate GTD (Getting Things Done) system for the iPhone. Sure, you can add to-dos and due dates, but you can also add detailed notes to your items. In the Projects section, you are able to create a project list to accommodate all of the to-dos associated with the project. On the main screen, you are able to filter your to-dos (i.e. today, next in line, scheduled, or someday).