Write HTML Right
Even with a lot of help from a good text editor, writing HTML can be a drag. Nice documents end up as tag-swamps with little bits of content perched atop hills of tabs. Editing them becomes a test of patience and we get sick at the thought of having to look at our once-loved text. It doesn't have to be like this! There's a lightweight, easygoing way to write HTML that's been around since the beginning of the web.
Source: Write HTML Right, an article by Aaron D. Parks.