I am a “momtrepreneur”: a mother who also happens to be an entrepreneur. I have taught piano for 13 years and have run “(my last name) Piano Studio” for almost a decade, dutifully filing my business taxes each year. My sole advertisement is word-of-mouth, and the Lord has always graciously provided me with the amount of students I can handle. One thing I do need to do, however, is to check into business card printing. I have never created a business card, and when people ask for one, I end up having to write my contact information on a piece of paper, all the while stumbling around trying to explain why I don’t have a card to give them. I am painfully aware that my lack of business cards has at times left a less-than-professional impression. What are items you view as indispensable for the professional operation of your business?