Best reply this one by octega.
No.1 Look straight very important.
I pick the top end of a sign board post, that is straight ahead,
and lock my sight on it. I stare at it and let my reflexes take
over.
Also before you move off, you must check back. Don't check back and
immediately move off. Your aiming might be off. Check back, then
for 1 sec or 2 sec, ready, steady, aim, and then move off, when on
the plank, lock your eyesight on the spot you have chosen. Never
shift your sight, look down liao.
The rest follow points 2 to 4 above.