It sounds like you are running on empty. I know that feeling well and I have found some sound ways to understand that root cause of the problem and get beyond it without requiring massive change or willpower.
The article on procrastination explains how we procrastinate because we attempt to do too many things that we don't have the ability to do
in the moment and that's a crucial distinction.
Procrastination
The article on negative affirmations provides an easy to use and effective method for kick-starting yourself when you are really deep into the doldrums.
Negative Affirmations
What mostly ails you is that you feel unfulfilled because you have so much focus on what you don't have/cannot do. You don't allow yourself to stop and feel good and powerful about all the good things that you have right now.
For a deeper insight into the internal struggle that you currently experience you can read this paper. It's long but very insightful. It explains why we often seem to endlessly struggle against ourselves and, through understanding the causes, how to work in harmony with our inner nature (which means that we get things done much easier).
http://www.nickpagan.com/blog/wp-con...fectly-v10.pdf
Hope this helps,
Nick