Visualize yourself doing something that you may feel uncomfortable with, prospecting for new business, closing a sale, maybe talking to your boss, going for a promotion, bringing a potential issue to the table, going to a meeting, walking into a room of people for a function, etc. Picture it in your mind's eye, plan it out just the way you want it to be. Over and over again, role play it with someone. The more you practice this up until that moment, the better it will go. MOVE ON Learn to let it go.
Negativity is contagious.
It spreads to all other customers and employees. One customer has nothing to do with the next. One employee has nothing to do with the next. Don't pass it on. Don't drag out a problem.