As a writer, I do a lot of sitting. This doesn't sit well with a middle-aged body. So, the most important part of my day is my workout.
I do this religiously every morning. I start off with a twenty minute ride on my stationary bike, followed by a five minute cool-down. Afterward I do about five to ten minutes of stretching.
Then I vary the routine by alternating between two workout video tapes. One is lifting light weights, for both upper and lower body, followed by an abdominal and back workout.
The other video concentrates more on abdominals, with a few leg and back exercises included.
During the warm weather months, I also add in outdoor walks for variety.
After the workout, I pour myself a glass of orange juice and check my email.
My workout wakes me up, makes me look and feel great and stimulates my mind for whatever writing projects I have to work on that day.
So, if you're in a slump, try working out. It really gets the creative juices flowing.