One morning you may wake up and find yourself fed up with your hair. You may then be tempted to get out of the shower, turn your head upside down over the bathroom trashcan, and cut FIVE inches off of your own hair.
When and if that day arrives for you, please remember my piece of advice, hard won through personal experience:
Girl, your forehead is a LOT closer to that trashcan than the back of your head is.
If you fail to heed my warning, you will wind up with very short front layers even though the back of your hair is the right length. It may take you a day or two to figure out how to avoid looking like Jennifer Aniston circa 1996. Consider yourself warned.