You will need a CAC card, A CAC card reader and an AKO account to set up your CAC card reader.
In the attachment section, below, you will find a copy of all of the CAC card processing facilities in SD. Schedule an appointment as soon as possible, remember to set up your AKO account prior to visiting the facility (if you don't, you won't be able to get a card).
I purchased my CAC Card reader at www.buy.com for $21.10 (shipping and tax included). Type this into the search engine and you should be able to find it: CM Micro USB Smart Card Reader - Smart Card - USB.
Go to www.us.army.mil. Once your information is loaded into the system (this may take a very long time), click on register for AKO and fill out the requested information.
Steps in setting up your CAC card reader:
Log into AKO.
Under the Quicklinks tab-->CAC-->CAC resource center. Follow the instructions entitled "CAC installation Quick Start" in the mid to upper left hand corner of the new page.