It's clear we are practising a sport and the better fitness level we have the better technique we can develop.

In particular we must strengthen our arms, forearms and hands. Our safety and enjoyment depends on this and also gives us confidence to better ourselves..
A simple spring that we can use during free time can give us surprising results.
Technique always goes hand in hand with practice. Try to treat it like a game and practise on steps, ramps and steep hills.
Fix your eyes on a sufficient distance to give you time to react and ride at an appropriate speed with enougth inertia for all kinds of obstacles.

Following the wheel of a companion who is descending well is a good way of learning the correct trail , braking points, maintaining a correct speed at all times and keeping a correct posture on the mountain bike.
Unblocking your mind to try more dificult manouvres, as well as achieving a good speed, thinking only about riding and enjoying the incredible sensations that a descent gives you.