I have not been here long enough to have any 'hidden' secrets except SEOmoz

However, I do find that backlinks with great anchors really, really works well.

I agree with Barry, but watch out for that last snippet. I've got caught when hosting companies redirect on their side. So test before walking away for more coffee : )

micro formats are recommended. Top of site if possible. I like to place full add in the contact us Title : )

http://microformats.org/wiki/hcard

Great question. I tend to just map it out by hand categories / sub categories / products/services but I can see how that can get quite daunting on very large sites.

Thanks Sameer, I'll have to check these out