I occasionally speak with people that are having problems managing their email -- usually these are the people that do not respond to your email or miss an occasional meeting. I started recommending a series from 43 Folders on managing your email, and these folks are having success. The series is called Zero Inbox. 43 Folders' Zero Inbox takes you through a fairly simple 10 step process that will lead you email success.
If you find Zero Inbox helpful (or maybe you do not need it), checkout other "life hacks" such as building a smarter to-do list or procrastination dash. Procrastination... hmm... maybe that is a better place to start.
What are you waiting for? Give 43 Folders a try.