Social media is now one of the main ways businesses promote their products, services and events and some of my clients have embraced this fully. My work now includes graphics for Facebook, blogs, Google Plus, podcasts as well as various eye-catching call-to-action buttons and images for their website.
The example here is of Accepted.com's Facebook page with a cover image advertising a webinar. I kept it super simple. The yellow striped area leads the eye down to where one can register for this event. The viewer can very easily see where to click! The trick is to using the Facebook layout (or other social media) to your best advantage to generate leads and income.