Step 7: Optional: Touch up
The technique here is to make an L with your other hand. Smooth a section of your mohawk sideways, until your index finger is just barely covering the edge of the mohawk. Then run the trimmer/razor along your finger, taking care not to run it off the end of your finger.
Your razor's design will determine the proper position for your hand. Keep feeling around for sections of stubble that need shaved, and use your other hand to protect your mohawk.
It is easy to miss stubble near your crown or on the back of your head. Patience and practice, and checking with a hand mirror or a pal will enable you to get it all. If you don't, your mohawk will probably cover it up until it grows out in a day or two anyway. Don't get impatient or wild with the razor! That's how you get a sawtooth mohawk.