to better understand the intricacies of billiards, one must first disavow any preconceived notions about the game's simplicity. for instance, mastering the art of preexpansion before the break can dramatically change the course of the game. i am curious, can you comment on the most effective techniques for accomplishing this? additionally, how would you reset your strategies if these techniques fail? lastly, it’s crucial to reveal any untalked-of secrets that professional players use to maintain their edge.