Steven:
This "toss the concern to the wind with wild abandon" sometimes is the juice I need to make those medium-to-difficult shots in pressure situations, when I'm not playing my best for any of a number of reasons. I've managed to shake myself out of ruts with this approach, and "broke through" whatever funk it was that was keeping me back. Sometimes, other thoughts racing through our minds (e.g. hard day at work, personal life, etc.) bleeds our concentration, even if we think we're not thinking about it. Just gritting your teeth (figuratively speaking), growl internally a bit, and shoot the shot like you mean it (because you do!) somehow tells your mind that this pool game is more important than whatever background "noise" is going on in your mind, and from that point forward, bumps the priority of the game "higher" in your mind. Again, the key (for me) is not talking to yourself (either audibly or internally) because this engages the conscious brain. You want to engage the subconscious brain, the one that's been storing away all the eye/hand/arm/body coordination for successful shots during all your practice; you want to call upon this vast storehouse of information and yank out the piece of info you need to execute the shot, keeping that doorway to the subconscious open for subsequent shots.
Just some food for thought; hope it's useful! Again, great thread, and I'm sure we're going to see some very interesting and useful replies!
-Sean
14.1 high run: 133 (9ft table)
9-ball: 9-pack (9ft table)
8-ball: 7-pack (9ft table)