Hi, To avoid spamming, you should bookmark other sites in your industry which are providing value. Bookmark only the very BEST of your content. Social Poster - This is a free tool, which allows you to bookmark 79 sites all at once! There are share buttons you can install on your blog for easier use for submitting to the bookmarking sites. Only Wire - This is another free tool, allowing you to bookmark to many sites, but has an upgradable paid version, should you wish to submit to even more sites than the basic version. There is also a WordPress plugin available for only-wire, which can make the process of submitting, to all your social bookmarking sites, even easier. Social Bookmarking - This is another tool, which allows you to bookmark to many sites at once as well.. Share buttons are available to install on your blog too.
Social bookmarking can be done in do follow sites.Share buttons are also available to install on your blog.Only wire is the best tool, but it has an upgradable paid version.