Pricing your home is an important decision to make and sometimes it can even be tricky. If you price the house correctly, the house will sell, quickly. If you price the house incorrectly, the property can sit for a very long time.
And adjusting the price after the fact will not necessarily remedy all; most of the attention given to a property is at its initial listing, and properties with extended days on market tend to be looked at with some negative stigma, for many different rationalizations (or irrationalizations!).
For these reasons, it is important to mark the initial list price correctly. The best way to avoid these types of mistakes is by arming yourself with information and finding a real estate professional you trust.