Practice

Practice Makes Permanent
Find out what you should be practicing (take a private lesson and ask specifically what you should practice, alone or with someone)
Make sure you are doing it correctly (get checked out and make sure you are executing the exercise correctly)
Do Not just do something over and over, right or wrong, you will have to unlearn it later (this is far more difficult)
Be willing to give up your preconceptions (if you were driving somewhere and found out that you were going in the wrong direction it might be wise to turn around or change course but sometimes it is better to push reset and start again.)