Escaping the Fog
Some days, the large tasks can overwhelm. You stare at the total workload and enter a melancholic fog. In my experience, the only way out is to focus on the completion of small tasks. You run off that document, prepare that file, and identify the first task of the project itself. Do that and then another and another. Stick to small things. Work slowly, with deliberation. The fog may not lift entirely but it will lift.
As a zen saying goes: When you are happy, sweep. When you are unhappy, sweep.