Remove the sponsored "stories" on the main page
The home page is in need of a serious cleanup. There are so many "sponsored" links disguised as news that it has become very difficult to navigate. Fat-burning ads, "speed up your pc" scams...this is not content worthy of a legitimate site.
Take a cue from Google: their landing page is clean and uncluttered. When I visit yahoo I want to check the news or get my mail, and I don't mind some ads, but when there are just as many ads as actual stories the site becomes tedious and unuseable.
Make the site easier to read, and faster to access, and people will stick around.