Google Tasks are your friends

Need a way to manage your daily tasks? Have Gmail? Try Google Tasks!

Here are the Keyboard Shortcuts (more info at: https://mail.google.com/support/bin/answer.py?hl=en&ctx=mail&answer=106237)

Useful keyboard shortcuts include:

In Gmail	Shift + T	Create a task based on the open message
	G and then K	Open Tasks, or shift the cursor from Gmail to Tasks
In the Tasks Window	Tab	Moves task right ("subtasks")
	Shift + Tab	Moves task left
	Ctrl + Up	Moves task up
	Ctrl + Down	Moves task down
	Shift + Enter	Edit task details, including due date or notes
	Esc	Close Tasks
	Shift + Esc	Shift the cursor from Tasks to Gmail