Add IntelliSense to HTML files in VS2005
There are many times when I just need to create an HTML file for a very small page, but I hate not having the Intellisense. To add the Intellisense in the VS designer for HTML or old ASP pages just put the line below in your HTML head section. Then Presto! you have Intellisense and the wizards to help you design your page faster.
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
--Brendon Schwartz