what's your opinion on "Or should I stick to one comprehensive link section? Or perhaps a small link section? Or none at all?"
My answer to questions like this is: what is most compelling for the user. In the past I would focus on a wide variety of things including good content, but I've been strongly influenced by fellow MOZ member EGOL and in recent months I've devoted considerable time and money to creating really great content and I have already seen the benefits. Sure, the articles have internal and external links and I do ensure things like G+ authorship are done correctly and other SEO minutia, but I'm always thinking in terms of usefulness to the reader.
As for specific questions regarding follow and nofollow, some of the things I would use nofollow include paid links, forum/blog comments, and a footer link to another site. I can't think of a reason I would ever nofollow an unpaid link to a reputable and related site that I included in an article or a page that I wrote. If I included the link then that means I think it has value for my reader. And, Google has made it very clear that nofollow does not affect the denominator when dividing the page range among the linked articles, so why discard the page rank?
Good discussion. Thanks for asking.
Best,
Christopher