Now that you are your own designer, you need a place to print. There are too many online and local print providers to count, so I've listed a few of my favorites below. I always prefer to buy local because there are no shipping times, I can request proofs, paper and ink samples and nothing beats talking to someone face to face.
Think Pro
Impression Makers
Alpha Graphics
FedEx Office (formerly Kinkos)
Copy Max
Local Screen Printing Shops
Acme
Brand X
Think Pro
Local Sign Makers
Super Signs
But if I need 500 postcards in 5 days and I have a super tight budget- online printing is the usually the best method. Always request a hardcopy proof to garentee your colors are accurate.I recommend researching your your document specs at each site and finding the best deal for you. These sites often have sales, so it pays to research if you have the time. Here are some vendors I've had success with: