Common Mistakes
The most common mistake we get when people submit rules for publication is submitting them as a Microsoft Word document and not in a graphic program format. Rules, like box tops and game boards need to be in a graphic design format like Adobe Illustrator. It won't affect the playability of your game, but may delay production.
Another common mistake results from over familiarity. You've played the game 1000 times, so you assume things that new players won't know. Make sure to write your rules from the perspective of someone approaching your game for the very first time.
Rules Guideline HTML | PDF (coming soon)
This outline covers all the basics to get your rules organized. It is based on a handout used by noted game designer James Earnest at a presentation on game design.