"Interest, energy and ability go up and down all the time. Trying to work through it when you're miserable is unproductive. The way many of our jobs and careers are planned leads to doing the same thing for hours, even years on end. It doesn't account for the fact that people aren't built to work that way. Your interest and ability to do a particular job or task varies over time. It's more effective to plan for it than to simply try to work through it, or spend unproductive hours staring at a screen. "Design your work day, and potentially even your career to take that into account."
So, today is Friday and it is promising to be a beautiful day. Work Hard but Don't forget to Smell the Roses, Walk through the Park, Relish the Sun on Your Face. Monday will be here soon enough
Source: The Four Hour Workweek