I live in Atlanta what kind of food and what type places you interested in visiting?
The new Coke Museum and store opened a few years ago and you can sample dinks for different continents, the parking garage is like $10. The Georgia Aquarium is next door to it too. Some people like to goto Underground Atlanta but dont go there by yourself at night I heard people have been mugged. You can visit Margret Mitchells Apt where she wrote "Gone With The Wind" but I heard it pretty boring!
There are lots of good places to eat in Buckhead! Just depends on what you like to eat.
The only cards shops are the On Deck that has been Mentioned but the two good ones are Freedom Cardboard formerly Atlanta Sportscards on Nesbit Ferry in Alpharetta or ChampionSportscards in Kennesaw everything else has closed down.