WITH A SENSE OF PURPOSE

"I don't just come to the gym and shoot.  Every drill I do, I do with game-like movement.  I don't stand still and shoot."

- Rip Hamilton

Detroit Pistons

Practicing with a sense of purpose means you are targeting a specific area of your game in order to improve it.  But your goal of improvement should be tied to being able to perform the way you want to in a game.  You should be practicing the skill at the same speed, tempo and movements that you will likely have to use during a real game.  

Through constant repetition, you are preparing for the moment (in a game) that you can shake your defender and execute the skill.

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