Adding links will help my SEO?

[Matthew]

If you think that those links will be helpful to your viewers, put them in. If you think they are valuable links, your readers will click on them and tell people that your a reliable source of information, increasing your web traffic and thus increasing your page ranking.

Bottom line, no, adding links to high traffic sites won't get you a higher page ranking. But that doesn't mean that you shouldn't put valuable links onto your website.