Yes, visualisation is another useful tool.
In its basic form it's just thinking your way through the movement. You run through all the parts of a movement in your head from start to finish, seeing it as though you're actually doing it, and work out what you have to do at each point. Doing this helps your mind get used to the feelings and sensations so they don't come as a shock later on.
Then, the more parts you can add in through your imagination the better. If you can picture what you're going to be seeing throughout the movement then you can move on to recreating the commands to move your body, maybe even recreating the exact movements themselves on the spot. After that, you can work on recreating the feelings you are going to be experiencing during the movement, so you can get used to that part of the experience too.
Visualisation is all about recreating the feeling of moving without actually moving. The closer you can get to what you will experience when you actually do the movement, the better prepared you are going to be.
Visualisation is very difficult to use with movements that you are unfamiliar with, because you don't know what feelings and thoughts to recreate. I don't think visualisation ever hinders you, I think it just shows you where you are already weak.
Trying to be a helping hand from NorthernParkour and the British Parkour Coaching Association