We just sold and bought in the last 3 months. And I have to disagree with paoberle on one point. Absolutely remove personal items and not just photos. Put away anything of value and make sure that medications are out of sight. This was actually our realtor's recommendation. Sadly, in this day and age (especially with online virtual house tours) not all people viewing your property are in the market to buy. Some just might be 'casing the joint'. It is an agent's duty to stay with a client while touring your home but no one can be with two people going in opposite directions.
Curb appeal is very important because many people seem to judge by what they see, not what they could do to a property. A clean, neat de-cluttered house looks bigger and shows better. If you don't believe me, take a photo of one room in your house as it is right now. Then take a little time, give it a good de-clutter and take another photo. The difference can be amazing.
Good luck with your sale.