I'm reading The Artists Way again, and I recommend it to anyone who seeks to increase their creativity and productivity, and it's not just for so-called artists!
One of the exercises it promotes is morning pages, or writing three pages of longhand anything every morning, first thing. There is no need to censor or critique what you put down, just get the pen moving. It doesn't matter what you write about.
It might sound silly, but I've been doing it for a few days and it's really having a powerful effect...
Anyone who faithfully writes morning pages will be led to a connection with a source of wisdom within. -- Julia Cameron