From Glen Stansberry's blog:
Here are ten of some of the most underused and misunderstood tags in HTML. While they might be less familiar, they're still quite useful in certain situations.
- <cite>
- <optgroup>
- <acronym>
- <address>
- <ins> and <del>
- <label>
- <fieldset>
- <abbr>
- <rel>
- <wbr>
I've used only three of these tags in my web development projects. Its amazing how my life could have been simplified by the use of one of these.
More information on usage of these tags can be found at Glen Stansberry's blog post.