“Someone will find the shortcuts and exploits in your game that you didn’t expect. And people will do what it takes to win, even if it isn’t fun.”
— Bez
“Game Design 101: if you’re starting out, don’t worry about processes, techniques or publishing. Just. Design. Games.”
— Alan E Paull

Pointers for pitching your game to different audiences: players, playtesters, publishers, and retailers (video)

Pointers and pitfalls for making a game based on existing intellectual property (video)