You may not have had the most interesting childhood in the world; but then again, you may have had an experience that was more interesting the most. The idea is to highlight the best parts when you can. And always remember that the things that don't seem very interesting to you may be interesting to others.
If you live in an inner city, for instance, you should realize that many people who grew up in the country have never ridden a subway, never walked to school, never ridden in a taxi, and never walked to a store.
On the other hand, if you grew up in the country you should consider that many people who grew up in the suburbs or inner city have never eaten food straight from a garden, never camped in their backyards, never fed chickens on a working farm, never watched their parents canning food, and never been to a county fair or a small town festival.
There will always be something about your childhood that will seem unique to others. You just have to step outside your life for a moment and address the readers as if they knew nothing about your region and culture.