For people looking for more advanced todo systems: 1. GTD: Actionable todos with contexts (plenty of apps out there) 2. 7 Habits of Highly Effective People: P

For people looking for more advanced todo systems: 1. GTD: Actionable todos with contexts (plenty of apps out there) 2. 7 Habits of Highly Effective People: Puts a accent on your goals (http://weekplan.net http://weekplan.net Disclaimer: my app) 3. Personal Kanban: Tells you not to start too many things at the same time (with http://trello.com http://trello.com)