Try it now:
Identify the most important thing you have to do today.
Decide to do just the first little part of it — just the first minute, or even 30 seconds of it. Getting started is the only thing in the world that matters.
Clear away distractions. Turn everything off. Close all programs. There should just be you, and your task.
Sit there, and focus on getting started. Not doing the whole task, just starting.