A link or article that nobody sees doesn't count.
It's the old tree falls in a forest adage.
How do you get search engines or people to see your bookmarks you build backlinks to them? You can social bookmark the profile pages of your bookmarks or write articles linking your profile page or even individual bookmarks.
You can also use amplify as a do-follow twitter to notify the world about your bookmarks.
Okay now that you know how to index your bookmarks what should you use your bookmarks for? You should use do-follow link sharing websites to build links to your articles and websites.
If the social linkbuilding site has revenue sharing enabled you can even make money from your bookmarks.
The fastest way to get a page indexed by the search engines is to get a do-follow link from another page already indexed in the search engines.
If your websites or articles aren't indexed nobody will read them and you won't make any money! Even if your articles are already indexed you can use social bookmarking to build one way links to the page.
What features should you look for in a social bookmark making site? First, ignore the Page Rank of the site.
The Page Rank is only a tool to measure the progress of a site.
You want to see a social bookmarking site that is constantly improving in page rank and getting more and more links to a domain.
So you want to look for Social Bookmarking site with a high Page Rank velocity.
Second, look at the internal link structure, you can't realistically be expected to build links to every individual bookmark.
You want your bookmarks to be interconnected by a profile page and for all your bookmarks to link to that profile page.