I would say Toggl is a good time tracking tool to use for it can be use anywhere to anything: PC, Mac, iPod, iPhone, iPad, and Android. It can be also automatically syncs to Quicbooks and Freshbooks. With a simple interface and a user friendly it would be easy to you to use it.
If you’re looking for a time tracking that can help you stay focus on work keep you organize maybe Rescutime can help. With this tool it can block unrelated to work website for a period of time.
I also found this blog
that discusses more information about time tracking and its features.