• Don't put main cover line at the bottom of the cover. It needs to be in a prime location
• Don't use illustrations on the cover
• Don't be depressing on the cover
• Don't be too clever or too cute with cover lines
• Don't be subtle
• Don't have a cluttered cover. On the cover less is more
• Don't be afraid to sell. Use the cover as a marketing tool, because that's what it is. It is not an artist's portfolio
• Don't use white drop out cover lines, unless the type is huge
• Don't be afraid to do all type covers. Sometimes these can be more effective than using a photo
• Don't be preachy, pompous, or pretentious on the cover