It can be extremely tempting to use automated forms to submit your website or blog to social bookmarking sites. After all, it saves you a lot of time and hassle... It can take hours every day to perform a successful social bookmarking campaign. However, you will have a much better result if you submit your articles by hand..."
*Has a compiled list of bookmarking programs, a must read*
Read this very informative article here
http://www.socialnetworkingarticles.com/?p=189
