Always look professional. I know I told you not to judge a customer by their appearance. Wish I could say they will do the same to you. A sure way to gain consumer confidence is to look the part. A sloppy appearance, lack of a uniform, untidy hair, excessive jewelry, etc., are the cover by which the book is judged.
Customers gravitate to the salespeople who look like they know the most.
Chances are they are also the ones dressed appropriately. Know your product. Lack of real sales skills can often be overlooked if you possess good product knowledge. Buying from a confident salesperson makes customers feel better about their purchase. They feel like they have a guarantee that the product will work for them.