Physically tired is not the same as brain-dead, and neither one is the same as procrastinating. Most people need recovery time from both physical and mental exertion. A good trick is to "put things by the door", that is, make sure the barrier to doing something useful is low, and is easily perceived. For example, put books you want to read in a place where you might pick them up and read them when you have a few minutes free. You can also consciously pursue mental and physical pick-me-ups, like listening to up-tempo music. On the other hand, procrastination is a different problem, so you have to figure out what's going on in your case.
Originally Posted by Tom.9