Each path had several paths or choices. There's less sequencing, so it makes more sense to have the standard opening graphic be a series of topic buttons, much like the Museum of Paleontology. In both cases, it helped to draw a diagram of the major structure. Naturally, this doesn't prevent me from having many cross- references within the structure, but I'm trying to keep the overall structure clear and fairly simple. Users want to know where they are, and how to skim effectively.
Some viewers use a gray background, some white, some colors.
You can also now choose a background for Netscape viewers, although those with slow connections may be unhappy with this. You won't be able to make your graphics blend in to all viewers - so take your pick, or design generically. If your graphics device has the capability, jot down the length and width in pixels - it's helpful to list these for some viewers. Jot down the size of the larger files, too - you'll want to list them when you make links, so those with slow connections don't get stuck downloading a large file unintentionally. THEN make an html template.