Know user tolerances

I've searched "web usability" in Google and found 10 tips for the web design. Some of the tips I think are particular important and useful for web design and I would like to share them with all of you.

The Know user tolerances stated, “Users are impatient. Design for a 2-10 second maximum download. Reuse header graphics so they can load from cache. Avoid excessive scrolling.” The other point is, Multimedia – be discriminating stated that "Too much movement distracts, slowing reading and comprehension" I totally agree with this two points, as one of my previous web projects was help my friend to redesign his web site. His requirement was to make the web site more “active and interesting”. I added many flash animation with high-resolution photos. The animation takes long time to download them. Finally, I need to recreate all animation since I haven’t considered this point at the beginning of the web design.

Therefore, I would like to share this “good lesson” with all of you and hope you can learn from it.