An interesting idea.

When you get a moment, write down in a journal EVERYTHING about yourself as far back as you can remember....friends you had or still have, good times you shared, bad times, different places you lived, opinions you used to have, people from different walks of life you have met, special brief moments that for some reason you still remember, who you are today...you get the picture. During those times when you feel like you have done nothing in your life, feel like you have meant nothing and maybe forgot who you are..go back and read what you wrote. You'll find you're quite an interesting person and you may just even learn more about yourself :)