Your current site does have some SEO issues. For a start, in the <head></head> section of your home page, there is:
<meta name="description" content="Lorelei Bliss 2.0, Free theme, WordPress Free theme, download" />
<meta name="keywords" content="WordPress, theme, viewer, new, blog, lorelei, Darklight, 2.0, web 2.0, free, download"/>
which has nothing to do your site's content. Your theme's header.php file needs editing to remove those lines. Then you can use something like All In One SEO to create far more accurate and optimised meta-descriptions for each of your posts and pages.
Overall, the theme isn't too bad. It could be tweaked a little but not to the extent that you'd see an exponential rise in traffic.
There are areas where you can start optimising your content immediately. You could stop using the Bold Text feature all of the time in your posts. Bold text is the equivalent of a raised voice in search engine terms, so you spend a lot of your time shouting in your posts. when this happens in Real Life, people stop listening after a while. The same thing happens with search engines.
If you need bolder text for readability, amend the theme - not the text.
Read http://codex.wordpress.org/Search_Engine_Optimization_for_WordPress
It contains a great deal of good, relatively non-technical, advice.