How easy for others. I believe that enthusiasm is a matter of choice like the choice of attitude. You can choose to make it a good day. It sure does pay well though in repeat customers. I know, I know, you can't smile on the internet.
Language carries it's own message of enthusiasm.
Use positive language in a consistent manner. Use positive ads, positive, uplifting messages in your conduct of business and you will be rewarded. Get these article syndication feeds for your web site, free.