You need to have quality content that will draw people to your website. It sounds simple, but writing sufficiently high quality content is very time consuming.
Diigo is also one of the many social bookmarking sites on the net. Basically most of us just use such sites by posting the urls and description of our articles and forget them. I would advise you to also increase your friends list on diigo and try to vote atleast 5 different article a day from different users. This is how eventually it will help you to draw visitors to your site, which is also called Cross Bookmarking
the similar bookmarks like digg and reddit generate much more traffic.. so may be you should concentrate your efforts on them.
Diigo is a powerful research tool and a knowledge-sharing community, so if you write niche quality content that will drag people to you. your put your online bookmark with quality content...people may also follow the link. Best of luck
Diigo is among the newest web tools preferred. Not only can you use Diigo to save your favorite Internet bookmarks, you can also use Diigo to put yellow stickers on the web, highlighting your favorite news, commentary and much more. The way fans act like some other bookmarking sites like Digg or delicious.