You're welcome but do be aware that it will take several days for your posts to begin to display on the Topics page after your remove excessive tags.
I strongly encourage all bloggers not to rely only on traffic from the Topics pages which is a negligible flow at best. The flow of traffic from Google and other search engines is what one ought to be focused on.
These 5 videos introduce how Google discovers, crawls, indexes your site’s pages, and how Google displays them in search results. It also touches lightly upon challenges webmasters and search engines face, such as duplicate content http://onecoolsitebloggingtips.com/2010/03/22/5google-webmasters-video-tutorials/
If you are using a WordPress.com theme good SEO is a given. However, going beyond the theme what the blogger has done within that structure is worth evaluating. Whether you write informative, persuasive or controversial content learning how search engines work, and how to apply basic SEO to you content will benefit your blog as it will increase traffic from targeted readers. http://onecoolsitebloggingtips.com/2011/10/21/two-seo-videos-for-bloggers/
When it comes to effective social networking I follow raincaoster's advice and encourage all bloggers to get personal ie. get rid of impersonal auto-posting and start posting manually. The most effective way to promote your posts via social media and social networks is to post unique snippets and links manually to each site.