I learned about this tool from the boys at Internet Business Mastery. Its a great tool that allows you to manage tasks, and get everyone on the same page. In the past, it seems most of these tools add another task which is “Learning how to manege the project management tool.” This is super intuitive, and I didn't need to watch any videos to figure out how to use it. Other people could learn form looking into this user interface. For me, when I get hired to build a website, I will set up all the tasks, and add my client as a use. Then they can be on the same page with in regards to what is expected, when its expected to be done, and when the project is complete.
Best of all it has a mobile app as well. Now I can keep up to date with my iphone (or on an html5 page with an android). Use as a task manager, lite CRM tool and more. Best of all if you have less than 30 users, it's free. For more information go to asana.com