If you are a literature fan, In the French Quarter, theres a cathedral, behind the cathedral is Faulkner House Books -- really neat place.
There was at least one cemetary tour I did, that was really quite interesting.
Had to google this link,
http://www.graylineneworleans.com/cocktail.shtml thats the Southern Comfort Cocktail Tour, not that I'd encourage drinking -- but - when in Rome.....
Food - -Lousiana Hot Sauce and Tabasco (there's a museum somewhere) goes on everything.
Bourbon street is great for nightlight, but be warned, there are some real seedy areas that you don't want to get lost in - and don't keep all your money/credit cards in your wallet- just in case.