I used to get haircuts once every month or so for around $20 a pop, which can really add up over the course of one's life. One day I finally drew the line, bought a buzzer and started cutting my own hair and, after a little practice, my friends' hair too.
Here's a video with the condensed info. Read on for the full details.
Step 1: Assemble Your Materials
Get a buzzer. Buzzer's from Wahl and Conair are really cheap if you look for them online. I got a buzzer with all the fixings from Amazon.com for $25.
Find something slick to make a gown out of. We used a piece of kite material because it was so slippery that the hair just slid right off.
Step 2: Put a Gown on the Subject
Step 3: Start Buzzing at the Top
Turn on the buzzer and slowly move from the front of the persons' head to the back. Be careful not to move to quickly as you'll catch their hair in the buzzer and give them a nasty tug.
Make consecutive passes from one side of their head to the other until you've got the whole top cut nice and short.
Step 4: Move on to the Sides and Bottom
Smooth even passes are the key here. It's much better to make a good pass once, rather then repeat the same pass over the same patch of hair over and over.
Step 5: Make a Line Around the Bottom of the Neck
Some people put a "V" at the bottom center of the neck line, but I don't see why you would want this. I just make one nice smooth continuous line all the way across.
Remember to trim any other extraneous hair as well at this point as the buzzing section of the haircut is coming to an end. Depending on how long they like their sideburns you can use the blade guard and the buzzer to clean those up too and make a nice transition between the sideburns and any facial hair they might have.
Step 6: Grab Some Scissors and Clean Up Around the Ears
That being said, once people realize that they don't have to pay for haircuts, they will most likely come back to you next time they need one. You'll be like Edward Scissor Hands in no time!
Step 7: Shake/Blow Off the Extra Hair
Hopefully if you haven't cut your subject's ear off or shaved their heads right down to the skin they should be pretty happy with their new cut!