SEO for an adult website

Hi everyone,

I need some advices about make a good seo work on my adult website.

any particular ideas about white hat SEO?
the website is a forum and has 18.000 members, made in one year.

got yourtube video (softcore), sitemap from autositemap in every page,
Wordpress blog section,
good tags,

how to improve pagerank?

ty

build a shed load of links!