This one's dead simple, but it's something I still see developers who have been writing HTML for a long time get wrong. If you want to provide links to particular spots within a page (e.g. http://www.sitepoint.com/#news), you don't need to fill your HTML code with <a name=""> tags - just use the id attribute on the elements you already do have!

In the past, if you wanted to provide a link to the 'News' section of your page, you'd have to do something like this:
<h2><a name="news"></a>News</h2>

These days, all browsers support in-page links based on the id attribute as well as the old-fashioned <a name=""> tag. So instead of the above, you can just do this:
<h2 id="news">News</h2>

A link to "#news" in this page will find either of the above example headings, but the second one is a lot neater, and also gives you the ability to apply styles to to heading based on its unique identifier if you need to.