HarryM - 12:00 pm on Aug 23, 2007 (gmt 0) Unfortunately what may be good for users may not be good for SE's.
I think tip #100 is problematic and should be used with caution. My reasoning is that a SE can compare the amount of text between Hx tags with the amount of text on the page. If it's above a certain percentage it may contribute to tripping a spam filter. I prefer to err on the safe side and stick to one H1 tag only, and no H2, H3, etc.
Unfortunately what may be good for users may not be good for SE's.