Park your vehicle where it will have the best appearance. First impression is very important. If there are scratches or other defects on one side of your vehicle, let the potential buyer see the opposite side first. Do not smoke or eat in a vehicle prior to selling it. Smells don't sell. When someone comes to look at your vehicle, let them take their time and don't bother them. Once you notice that he/she looks satisfied, but still hesitating, approach them. Tell them about any advantages of your vehicle that you haven't mentioned (i.e. snow tires, recent oil change). It may be to your advantage to remove any bolt on accessories and sell them separately. They can always be used as leverage in a sale (i.e. aftermarket rims, canopies, roof racks).
On the contrary, if the consumer looks completely dissatisfied, don't even try to deal with them; you are wasting your time.
If someone offers you a little lower price, take their phone number. You may later decide to change your mind.
Never let anyone test drive your vehicle alone. It is still under your insurance.
Some buyers (or their mechanic) while checking your vehicle will say something like: "Don't you see, your transmission is not working properly and will break soon?" or "This engine sounds bad, it is in need of serious repair." This may be done in order to convince you to lower your price. In order to avoid such a situation, you should know everything about your vehicle. Do your research and carefully check everything.