Here is a list of several task management tools.

Choose one of them based on what you feel best suits your work style and stick with it for seven days. If you still like it, then use that tool of choice for another 30 days. Should you decide after the additional 30 days to switch, repeat this process. Otherwise, congratulations! You've found your task manager and have done the front-end work for that tool.

Keep in mind that these are some of the tools I've looked at personally and feel can work for people. I may be missing some, but it is only because I wasn't a fan of them, or simply haven't tried them yet. I also have not listed pricing here as that can change over time. For more resources, including an up-to-date list of tools that you can use, visit the Task Management page on Workflowing.net. New and useful options will be added to the list regularly or put your favorites in the discussion below.

Asana

Ideal for collaborative projects/tasks and keeps you out of your email inbox. Also has a mobile version and iPhone app.

Omni Focus

A very robust and powerful task management application that is used by many across the Internet, meaning there are plenty of resources out there, including Asian Efficiency's OmniFocus Premium Posts.

Things 2

Another heavyweight in this space, has what is largely considered a "simpler" interface than OmniFocus and pretty powerful all the while.

ToodleDo

Another popular app, best suited for those who want power in a task management application that is cross- platform.

Remember The Milk

Another incredibly popular app, favoured much in the same way that ToodleDo is favoured...its power and versatility.

Flow

An effective and elegant collaborative task management app that has a lot of power under the hood and looks really good while helping you get things done.

Eisenhower

A different approach to the task management niche in that it relies on the 4 Quadrants approach originally popularized by Dwight Eisenhower. (You can also order its paper-based equivalent.

Evernote

One of the most widely used (and adaptable) productivity apps out there. Even if you don't use it for task management, grab it regardless. It's incredibly useful for note- keeping and storing research. (To really get to know Evernote, I highly recommend Evernote Essentials by my friend Brett Kelly. It's a simply stellar eBook that delivers the goods on Evernote.)

30/30

I use this app as a companion app in terms of task management. I've written about it in more detail later on.

If you're into paper, checkout Aaron Mahnke's Get Frictionless products and David Seah's Emergen Task Planner.