The use of frames. Frames break the fundamental design concept of the Web, are still not supported by many user's browsers, are difficult to print from, are cumbersome to maintain, and baffle search engines. It's almost always best not to use them . Most users prefer sites without frames. The overuse of graphics.
Graphic images increase download times.
The use of poor quality graphics. Web users associate credibility with the quality of a Web site's design. The better a site looks, the more likely it is that visitors will find its message credible. The overuse of animation. The human eye finds movement distracting.