Neil Pavitt in his book, Brainhack suggests compiling a “done” list rather than the usual demotivating ‘to do’ list. By keeping a journal of your successes, both inside and outside of work, you have a resource which can provide a boost to motivate you to achieve more. Neil also suggests changing the times you tackle tasks. Mornings and evening are best for creative thinking – the sleepy brain allows your mind to wander and generate more unexpected ideas; and the refreshed, post-breakfast, brain is best for analytic tasks.
You can also shake things up a bit by changing your routine, http://mymorningroutine.com/) gives an insight to the mornings of a number of successful people.
Read more in this interesting Financial Times article.