Can't tell you how often I've advised perspective authors that all we've got is our imagination and a small toolbox containing 26 letters and some grammar rules. "Otherwise, we're on our own," I remind them, "so we owe it to ourselves and our readers to protect those protocols."
That being said, here are some rules posted by one of my favourite libraries...
10 Rules to Remember on How To Write Good
1) Avoid Alliteration. Always.
2) Prepositions are not words to end a sentence with.
3) Avoid clichés like the plague. They're old hat.
4) Comparisons are as bad as clichés.
5) Don't be redundant. Don't use more words than necessary. It's highly superfluous. Got it? Good!
7) Who needs rhetorical questions?
7) Exaggeration is a billion times worse than understatement.
8) Speling is reely imporatnt when yu right.
9) Remember, the letter w is called "double u", but really it should be "double v".
And my personal fave:
10) Be more or less specific.