Your website must be easy to read
The most significant rule in is that your website must be easy to read, which means avoid using backgrounds which difficult to understand your text or use colors which are hard to read. You must not also set the text size which is too small or too large. And if you put the entire letters in capitalized then it will also shouting at your visitors. You should choose dark colored text on a light colored background is easier to read than light colored text on a dark colored background You must put the alignment of your main text to the left, not centered. Center aligned text is mainly best for headlines. You want your visitors to be relaxed with what they are reading, and most text is left aligned.
Your web site must be easy to navigate
The links must be clear to the visitors. Graphic images, like buttons or tabs, must be clearly labeled and easy to read. Your web graphic designer must choose the colors, backgrounds, and special effects for your web graphics very cautiously. It is more significant that the navigational buttons and tabs must be easily read and understand than to have "flashy" effects. Colors of the must be Link text must be familiar to your visitors. Generally blue text signifies an unvisited link and purple or maroon text signifies a visited link. If you don't want o utilize the default colors then you must highlight it another way. Your text link must be unique.
Your web page layout and design must be consistent throughout the site
The text with heading and footers must remain consistent throughout your website Alignment of the text and the header, background effects, and the special effects on graphics must stay the equivalent. You may use different color.
Your web site must take least time to download
It has been proven that online visitors quickly lose interest in your website if the pages take too much time to load; they leave the site after 15 seconds.