Create the "I've worked too hard to fail mentality"
When players put in the work they will not let themselves fail mentally or physically. It is so easy to get down on yourself regarding the game of basketball due to the many ups and downs the game offers. You are never going to play the perfect game but if you know in your mind that you are properly prepared to compete, you will not be your own worst enemy and psyc yourself out of your success. If you put effort behind your goals, your purpose will trump your doubt and that is what we want our players to experience. The work you put in validates what you deserve. Even if you fail the validation is that you gave everything you had and can never say what if.