If the site is for a business or organization, it is important to include an address, phone number and email contact. If the site is a personal site, disclosing an address or phone number is not advised because of privacy issues.
Some sites have information in more than one language, depending upon the possible audiences.
Organize your material to too much scrolling to find content. While working on photographs, save in .tiff format until the final quality and size is achieved, then save in .jpg. The quality does not degrade when working with .gif files. Don't resize images by just changing the size tags. This increases loading time.