Be Brand Consistent
If you have a logo, put it on your card.
Keep your fonts and colors consistent across all of your marketing materials.
This means that your business cards, letterhead, and all other printed products
should have the same layout and logo.
Whenever possible your logo should be included on all business stationery and
promotional products such as t-shirts, mugs, or stress balls.
This will keep your image professional and will create brand consistency.