How do you know it's time for a haircut?
Sometimes the answer to that question can be tricky. You don't want to go too soon, because you might miss the apex of your hair style, which unfortunately occurs immediately before it hits the nadir. Thus, timing is tricky with hair.
I find a simple formula helps me to know when it's time to go to the hairdresser:

The more I start to resemble David Coverdale of the 80's band Whitesnake, the greater the likelihood that I need a haircut. I would have to say that as of today, I have achieved 100% full Whitesnake.
Watch this video for more information.
