Here's something you need to address. Your final decision needs to be made BEFORE you get down on the shot, not after. If you are still in conceptualization mode when you get over the cue ball, you cannot give your complete attention to shot execution, which is all you should be thinking about once you are over the cue ball.
One of the game's oldest and wisest sayings is "make all your decisions standing."
I was reading the thread before making the same comment. Yours is the seventeenth post and yours is the first to point out his routine was flawed.
JudoChoke, Stu just pointed out something very basic, and very true! Things look different when you are standing and when you are bent over. Ah, I see that Geosnookery said what I was getting around to while I was typing, slow on the trigger today!
Might stir the pot mightily here but you can align the shot standing, or you can align it after you are bent over! However, you can't do both, different perspectives. It is a royal pain to decide on your shot lines after you are down on the shot so for the sake of consistency with almost all players I strongly recommend making all of your decisions standing.
Most of the time, changing your mind after you are down on a shot results in a miss. Decision making of any sort except deciding to stand back up when your "Spider Sense" is tingling and telling you things aren't right is a mistake. If you feel the shot is wrong, stand up! don't fudge that little bit while down on the shot, stand up! Check your distance from the table and alignment. If the shot still looks wrong adjust. Now give yourself ten or fifteen seconds just to calm your conscious mind and get it to shut up. That is gonna come hard for awhile when you have been making decisions while down on the shot. In my younger years and occasionally now, I play entire innings without a thought. If something goes wrong I will notice and regroup but the goal is to either win or play a planned safety from the ball I am starting on. I consider everything I do without interruption from my conscious mind to be one continuous action. Even now people don't like it when I hit that gear.
Great Advice from SJM(Stu) and Geosnookery. Read over what they both said a few times, burn it into long term memory.
I'll finish with another bit of advice. If you are using chalk that doesn't require chalking before every shot, don't make chalking part of your preshot routine. Chalk first if you need to, then start your preshot checklist. If you chalk every shot then making it part of your preshot routine is fine, even a good idea. Unless table conditions make it impossible, your preshot routine should be just that, a routine. After awhile you won't notice going through the routine, it is so much a part of the shot that you go through your routine on autopilot.
Hu