Aside from what you wear, nothing strikes a lasting impression like a well-crafted business card. In an article for Entrepreneur, John Williams (probably not the composer) lists five quick tips to help you construct yours.
ABC: A Business Card
Unless you have graphic design experience, it is probably a good idea to seek out a professional for help. Particularly if you intend to promote a whole business, it would behoove you to have one person designing and maintaining all the branding across various materials. Do not worry too much about design though, as Williams says simple is better. White space is not the enemy, and text needs to be a size people can read comfortably. And unless you are the really “adventurous type” (which is not necessarily a bad thing), stick with the standard 3.5” x 2” dimensions. You better be really great if your card does not fit in a rolodex. At a minimum, a good standard business card will include your name, company name/logo, email address, and phone number. Maybe include your address (etc.) if there is room left over. Interestingly, Williams’s final recommendation is to leave the back of the card blank (since most card storage units assume this side is blank), or to fill it with non-critical information like a company tagline. Use your intuition.
You can read the full article here: http://www.entrepreneur.com/article/159468