When designing a footer, consider avoiding the following: 1. Overcrowding the footer with excessive information, keeping it easy to scan. 2. Using too many colors or fonts may disrupt the website's visual consistency. 3. Opting for a font size that is too small makes it difficult for visitors to read. 4. Placing critical information in the footer, which one should reserve for secondary details. Important information, such as contact details and privacy policy, should be prominently displayed elsewhere on the website.