Manual transmissions make you feel much more in control of the car, especially during slowing. Once you learn, you won't like automatics so much (except for really, really long cross-country dealies. Like, longer than you're likely to get in the UK).
Sort of a companion idea to the zen approach: when the gears are aligned just right, you can actually shift without the clutch. I don't recommend that you do that, but that you think along the lines of the natural shifting point for each gear. My stepfather used to shift without the clutch occasionally, then shoot me a sly look.
But, yeah. Practice, practice, practice. One foot's going up while the other's going down.
Of course, I haven't driven in the UK yet. I have a feeling shifting with my left hand is going to make me want to cry for a while.