I agree with Bradkrussell, don't buy links, i own an eCommerce i have ranked #1 for 5 best keywords in that market and suddenly lost for #1 Goggle for that 5 keywords and lost 30% of my visitor, and now my visitor has normal again even when i still lost my ranks.
I see your website and i found your website hasn't friendly url for example http://www.perfectindesign.com/index.php?main_page=page&id=30 just try Nakul advice visitor not only comes from head keywords, i lost head keywords rank but now my visitor get normal even better than before, just make your website riched with keywords and done with good optimization,
Good luck
