14. Match the type to the mark
Display a level of unity across your design. For example, if you show a playful mark, try matching it with a playful typeface.
15. Offer a single-color version
The logo you design for your client might show a number of different colors, but you must also supply a version that uses just one. By doing so, you’ll improve the overall versatility of the identity and save your client from having to come back to you if the company opts for a single-color print run.