Writing FAST: How to Write Anything with Lightning Speed is a non-fiction book by Jeff Bollow, first published in Australia in 2004, which briefly became a best-seller on the Amazon.com charts in 2005.

The book targets new and intermediate writers, and distills the writing process into four parts - Focus, Apply, Strengthen, Tweak - which form the FAST acronym of the title.

The book's tone is conversational and motivational.