who can remind you to smile at your customers? and, ask questions of your customers? and, talk to your customers?
if not, then find someone. learning to better deal with your customers is not something that is going to happen overnight. often times, you will forget to use the lessons you have learned. (i wrote the book and i still forget sometimes!) if you have someone to remind you, it really helps.
and, yes, mother dear, i am being very careful when using my tools! 