When making points, use bullets. Since readers skim this will make it easier for them to kind what they are looking for. Writing for the Web isn't like any other form of writing. Don't force them to scroll through the information that they're not interested in. Make sure the information that jumps out is the most important.
Many readers scan just the headings and links rather than read all the text.
Use a table of contents at the top of pages and on separate index pages for lengthy documents and link to separate pages or link to text further down the page. But, as always shorter is better. Limit the length of your copy. Use white space, graphics, and varying type sizes and weights to break up the page. A good Web site is always up to date.