You need to be in the right place mentally, you need to understand jumping, no matter what there is no going back, but you will either die or live with serious injury. IF you can accept that, if you can bring all the hell to the front of your mind, all the hell that makes you want to CTB, bring to the edge that pain, realise that this is what you want, this is your desire, then jumping will be as easy as taking one step in front of the other.
(I have nearly jumped, I had NO SI using methods and similar above) but a random passerby pulled me back ffs