Gmail is becoming such a powerful app and at a fast rate. The newest addition is the ability to add a task (aka to-do) list.
This is a labs feature and once enabled adding a new task is as simple as clicking the list (or + symbol) and typing away and emails can be converted into tasks. In the past I would I have a work task list on my work computer, and an at home one on my home computer. Now I can have it in Gmail, and have access to it from anywhere. This is the beauty of cloud computing, it just makes life a lot simpler.