Response time
1 second is direct response
3 second is normal
Limit the image, large media contents
Use compression methods
Thumbnail image first then if user wants resize it to big
HTML text to allow the browser to represent a page before the images are fully loaded
Interaction efficiency
time users have to spend for navigation and input is also important for a system’s overall efficiency
mouse activities playing a dominating role.
Efficient interfaces of this sort minimize the distances to clickable elements
the size of elements should important
Colors
colors look entirely different on each device type /CRT, LCD/
we have to consider the fact that people with limited color vision
properly used colors can provide valuable support, e.g., red signals danger, green signals that everything is alright
we should also bear in mind cultural differences in the meaning of colors
Text layout
background of Web pages should not have a structure or pattern
we should speak the “user’s language”,