All you have to do is:
1) Go to http://www.facebook.com/customeyesvc
2) Click on the "Like" button at the top of the page (you must have a Facebook account in order to do this; it is very simple to create one if you don't.)
3) Click on "Events" on the left side of the page.
4) Click on the "Win a Free Pair of Designer Sunglasses!" event and then the "I'm Attending" button at the top and you're entered!
This will be ongoing until April 1st, when we will raffle off a pair of sunglasses to one of the attendees. Remember, you must RSVP to be eligible to win!