The best way is with a Vag-com. Another easy way to do a throttle body alignment is to follow the steps in step 8.

turn the key to the on position and wait about a minute and a half. That will allow your throttle body to re-align. If the hood of your car is still open you can put your key in the on position, hop out and go to your TB, you will hear a really high pitched note. That is your TB alignment in action. Once that high pitched note stops the alignment is done and you can start your car.