procrastination

http://www.newyorker.com/arts/critics/books/2010/10/11/101011crbo_books_surowiecki?currentPage=all

does it sometimes bother you that you don't have as much control over your own creative energies as you would like to? whether it's working on music or art or films or writing or whatever. I'm talking about the days where maybe you got up on the wrong side of the bed and you make tea and then...

This is a practical question. I'm sure everyone struggles with procrastination, low energy, and general laziness to some degree, but it is really affecting my life. I'm struggling with it a lot at the moment -- unsure of what could be physiological (vitamins/nutrients/glands/whatever) and what...