You need to take along your resident ID and a credit card to pay 150QR for 1 year or you can pay more for up to 3 years.
If you go into the departure door and turn immediate right the office is in front of you by the ATM machines.
They take the details from your ID they take your photo for the card and your right and left index finger prints and also do an iris scan. This all takes about 5 mins. Then they issue your card there and then.
The card then allows you to bypass passport control and the long queues this causes in and out of the airport by entering the booth. you swipe your card and the machine takes your finger print and your iris scan to confirm who you are and lets you through.
They are really good if you are travelling in and out of the country on a regular basis as passport control can take ages.

Keep Smiling :-) you never know who is looking