To know a species, look at its fears. To know yourself, look at your fears. Fear in itself is not important, but fear stands there and points you in the direction of things that are important. Don't be afraid of your fears, they're not there to scare you; they're there to let you know that something is worth it.
Meditation is a journey to know yourself. Knowing yourself has many layers. Start knowing your bodily discomforts. Know your success, know your failures. Know your fears. Know your irritations. Know your pleasures, joy and happiness. Know your mental wounds. Go deeper and examine every feeling you have.