Hello, and welcome to In My Bag! My name is Jenn, and this is my product review blog. 
With BlogHer and other blogging related conferences always on the horizon, it’s definitely a good idea to make sure you have an ample amount of business cards on hand. Even if you already have several hundred, you may still want to order a few hundred more, because you would be surprised at how quickly they will fly out at big conferences and busy exhibitions! You roll over to one of those big conferences where Samsung and eBay and PayPal and every other big company will be there, trust me, you’ll definitely want to have plenty of business cards. As I always say, better too much than not enough!
With that said, here are some tried & true sources for business cards:
123 Print
UPrinting (keep in mind that UPrinting requires that you have your own design on hand)
Vista Print
Do you know of any others? Feel free to share them in the comments!
MagnetStreet has a great selection of business cards and magnets. Quality is really good – http://www.magnetstreet.com/business