Todoist is the best to-do manager I've ever used!

Todoist just works - it's simplicity is part of its beauty. However, for a couple of issues I've had to reach out to support about in the 6 plus years I've used it, they've been responsive, honest, and helpful.

I've already recommended and converted several co-workers to this app. It works perfectly for adding tasks coming from email, brainstorming sessions, or just a normal workday. The ease with which you can enter tasks makes it so much easier to use than other options that I've come back to it on two different occasions after trying other methods. I can see cases where it isn't as appropriate - my wife is more likely to carry a notebook than a device, for instance, so it doesn't work as well. But given the integration and sync across devices, it's hard not to recommend for most folks for task tracking.