1) Interleaved Practice
Interleaving means switching between tasks.
Switching back and forth between technical work and random practice, or driver and wedges, or draws and fades increases cognitive load (I.e. it forces your brain to work harder).
Doing so speeds up the learning process, making you better at each individual task more quickly.
2) Visualisation
Picturing a shot before you hit it provides your brain with a clear picture of what you want to the ball to do.
This allows your subconscious mind to calculate the precise movements required to produce that shot.
3) Competitive Practice
Playing games in practice that mimic pressure situations on the golf course prepares you for the real thing.
Compete against others, play games that have a score attached or give yourself a task you have to complete before you can move on.
4) Self Talk
You might not have noticed, but during every round there's an ongoing internal conversation you're having with yourselt.
How you talk to yourself during this conversation is key to how you feel on the course and how you react to bad shots.
There's a lot of nuance here, but a good rule of thumb is to make sure you're talking to yourself like you would a friend in the same situation.
5) Goal Setting
Goals provide motivation and something to strive towards.
Set Outcome Goals based on events you want to win or a handicap you want to reach.
Set Performance Goals that identify key statistical areas you need to improve.
And set Process Goals that you can complete every day and every week that form the pathway to where you want to get to.