To maximize the performance of your Google Adword campaign, I have found the following strategy highly effective:

I. Optimize Account Structure

Campaign organization:

Organize your campaign into separate ad groups, each focusing specifically on certain products. For example, for the case of OSWeb2Design website, I created ads groups like E Commerce, E Learning, Personal Website, Organization/Business Websites, Social Networking. This structure allows the ads to be more targeted, increasing the likelihood of a prospective customer clicking through to your site.