How To Approach A Customer Or Client

How should I approach a customer or client?

You can approach a customer or client by saying something about the product. "That is a good color. Isn't it? Only came in yesterday." Now that shows that you know your product, you know your stock and you are up to date. And then you can go on with something like, "Is that the sort of thing that you were looking for?" You started the conversation and then you can carry on the process.