There are many reasons to make games — making a commercially successful product is only one measure of success.
— John Brieger
When writing game rules, be wary of VAST COSMIC FORCES that occupy the negative space when you don’t identify the actor in a sentence. Example:

”The deck is shuffled.”
BY WHOM?...
BY VAST COSMIC FORCES!

Try “Shuffle your deck.” or “Each player shuffles their deck.”
— Daniel Solis
Write down notable quotes from players. You can refer back to them during postgame discussion.
— John Brieger
As a game’s inventor, I’m the LEAST qualified to have final approval on its rulebook. Always get multiple eyes on it before going to press, especially if it’s a small rulebook.
— Daniel Solis
Pay attention to the whining of your testers. Even if they are objectively wrong, their emotional human response is a prophecy to the emotional human responses of your future customers.
— Grant Rodiek
There’s a difference between providing players advice and taking their moves for them / telling them what to do.
— John Brieger