Your own pictures of your business are far better than generic stock photography. Actual pictures of your product and your business will sell your product better than generic photographs that could also be on other web pages. However taking pictures for the Internet is different. You may have heard things like your subject should not be centered. Design principles like that do not apply; these are pictures for a purpose; not for art.
Follow These Steps To Get Great Pictures For Your Website

• Your subject should be centered and you should be far enough
  away so that all of it is in the picture and close enough so that
  there is very little if any background. Make sure no part of your
  subject touches the outside edge of the picture.
• Place your elbows on your waist and brace them in such a way
  that there is absolutely no movement. Carefully frame your shot
  and snap the picture.
• If possible plan your shot. If you are indoors make sure
  there is adequate light. Make sure not to use a flash in front of
  glass displays, mirrors, pictures or windows. Mirrors are
  especially bad since you can see the photographer in the picture.
  If you are outdoors try to have the sun at your back. Try not to
  take pictures at high noon; early evening is best. Late afternoon
  fall pictures are the best because the light is better than at
  any other time of year. By planning ahead you can avoid the
  pitfalls and get the best shot.