Ferrante, the others have mentioned depression, but you didn't, so I'm wondering whether you have considered that. What you describe sounds very much like clinical depression. Either way, if you haven't seen a doctor (or seen a good doctor), you really should.

I also wonder how you are feeling emotionally, and whether the solution to the problem is not going to be motivational techniques or clarifying your goals, but sorting out your emotions about the job, etc. If I say to you, "Do you feel loved, supported, and nurtured in your daily life?", what's your immediate reaction to that? If it's not positive, you might want to follow up on the emotional aspect. If you've got emotional "stuff" clogging up your brain, emotional open loops, etc, your capacity to do things is diminished by that just as much as it is by all the other stuff.

To me, Flylady is a necessary addition to the Allen/Covey mix because Flylady is a very emotion-centred approach. In truth I can barely stomach it most days, so this isn't a recommendation, but it does have methods for getting the emotional stuff sorted on a really fundamental level, and when I can feel loved, supported, etc, that gives me far greater capacity to get things done.