My advice: don't say what you can do, show what you can do. Start a project you can get excited about and demonstrates your ability to market a product or service. Document the entire process on your blog, and create awareness to your blog with Twitter.
Card games is a rather broad umbrella term. Do you mean card games like Poker, or Magic: The Gathering? Or something experimental like Rejection Therapy?
Just trying to figure out what your after. I never play Poker (I find it boring, and I don't gamble) but I'm fascinated by social experiments like Rejection Therapy.