Do:

• Do provide all measurements in both metric and English standard.
  • (For example, if you are using inches also provide the equivalent in centimeters.)
• Do label all images with an alt tag and a short description.
  • this provides accessibility for browser readers.
• Do use file names for your images and file that are descriptive.
  • This will help the browser spiders find your images and files in a search, thereby helping to raise your page rank and get more visitors.
• Do provide contact information.
  • At a minimum this should include a working e-mail address.
  • I would also suggest providing a phone number and an address (if the address is not a private residence) so that visitors feel more secure in the validity of the company.
• Do indicate the last time that the site was updated.
• Do promote new additions and changes to the site on the home page.
  • How else will people know you have made changes or added pages?
• Do double check your spelling and grammar. We all make mistakes so double check triple check and have your friends check.

Don't:

• Don't use symbols to indicate measurement.
  • They might be displayed incorrectly on a different browser.
• Don't use slang.
  • Slang is specific to a culture or a peer group and might be misinterpreted.
  • It also makes you look unprofessional.
• Don't use flashing buttons
• Don't use annoying sounds that can not be turned off.