web 2.0 - great for creating mini sites with articles and videos that link back to your main site.
bookmarks - excellent source for traffic - get your site bookmarked!
doc sharing - Yes these work! Submit your pdf or powerpoint today!
website directories - Most directories are crap but here's a few of the gems.
video - there's no doubt video marketing is huge and drives massive traffic. Takes some effort but it's worth it!
article directories - Not as powerful as they were a few years ago but still essential in any seo campaign.
blog directories - If you have a blog get listed on these sites.
rss - if you have a blog then create a rss feed and submit to these sites.
press release - This takes effort to craft a newsworthy article. if you know what you're doing this is the ultimate source for backlinks and news coverage.
infographics - Every niche has something that can be displayed in infographics - these are also great to use for press releases.
If you guys like this info I'll share another 50 in a couple days...