Tell the truth (even if you have to tell it slant).
“The secret of good writing is telling the truth.”
— Gordon Lish
Source: Project Gutenberg Self-Publishing Press, which cites the source as a Dick Cavett television interview, Aug. 25, 1991.
Browse the growing collection of Writing Quotes
Sure, you can poke around the Internet collecting writing prompts and creative writing exercises.
Or you could buy an ebook that collects them for you in one place.