These are NOT pieces of advice such as keeping the AC at 73, opening all the curtains, turning on all the fans and lights, or boiling coffee to have a better showing. Although they are helpful when showing your property.
 
These are fatal subtle mistakes home-sellers make that directly affect their negotiation power and the amount of money they get at closing.
After 20 years of selling houses in Broward County, I see how sellers accidentally hurt their strategic advantage, by giving sensitive information to the buyers.  
You can stop the bleeding by knowing why these error are so costly and how to avoid them.