Parallel parking used to stress me out extremely, but the few times I've had to do it now, it was always fine and I managed to get the car in in one go. I've learned that the way it is taught (at least here) in driving school isn't the best way to actually do it, they make you turn in the car at an too tight angle by turning the wheel in to the max, leading you to need to correct overly much. I believe it is done to get maximum vision, which is probably a good idea for someone just learning to drive, but the parking bit is then also much more complicated than it needs to be. The few times I've done it now I just didn't but the wheel in to the maximum and it worked much better.