I scope the table prior to each shot, not a complete walk around everytime, but at least a view from the OB to the pocket and a quick full-table scope to make sure what I am thinking of doing is my best option. I might have a plan to shoot 4 or 5 balls really quickly and know exactly where and how to move the CB for each one, but a glance around the table between shots can sometimes reveal a better option or a previously unseen opportunity. This is also when I'm chalking my cue.
Then I stand behind the CB and imagine exactly what I intend to do, getting a feel for exactly how much speed or spin is needed. I imagine the CB striking the OB, and sometimes I even make a little suction-like click sound between my tongue and the roof of my mouth...lol...seriously. I imagine the OB going to the pocket and the CB going where I intend it to go. All of this occurs in less than about 4 or 5 seconds. Longer on more difficult or tricky shots.
Next I step into the shot, paying no attention to exactly where my feet are being placed. They go where they need to go in order for my stroke to be in tune with the alignment of the shot. As I bend over into the stance and place my bridge hand on the table, I sort of bounce the butt of the cue around loose in my hand while fine-tuning my alignment, like the waggle I do just before taking a swing at a golf ball. Sometimes my bridge is open, sometimes it's closed, and it just happens automatically depending on the shot. I don't think about it.
I stroke the cue several times with a normal grip, then take three slower strokes, the first two verifying my shot/aim line, and the final one closing the deal. I release that final stroke and stay down until the ball hits the pocket, unless I have to move out of the way.