A computer screen is about the size of a standard sheet of paper, and nearly all we know about making the printed page readable applies to words on the screen as well. The following few rules have to do with putting words on the screen or page. Some things never change. The man is in need of Ritalin and has an ego as big as the Internet, but often as not he knows what he's talking about. And some of his pages are gorgeous .
Overuse negates the effect.
On the screen, use occasional bold face. Yellow is impossible to read most of the time. In fact, all light colors can be hard to read. Color can be distracting. It has a psychological effect, but most of us don't know what effect, and it may work against us.