Hopefully, the first thing that most people are going to think to do is to open the trunk and get out the jack and the spare. Every vehicle ought to come with its own spare, and if yours does not, you should make it a top priority to head to the nearest tire dealer and get one as soon as possible. When you have a tire that is blown out and shredded to bits, replacing it with a spare is the only thing that is going to get you off the side of the road anytime soon.
Another rather helpful solution for a tire that seems to mysteriously run out of air would be a repair kit, which consists of plugs and repair tools that can be used to fix any punctures in the tread of a tire. These tools are pretty easy to use as long as you can get the tire off of the vehicle and to a place where you have access to an air machine, like a nearby service station. Though they can stay for weeks, there is no absolute guarantee on how long a plug with help you, so you should still look to get a proper replacement. You should find great tips about tires by checking the site of ehow.
When one of your wheels has a slow leak and only deflates very gradually, it is likely that your problem can be temporarily solved with a can of foam sealant, which can be used to instantly inflate and seal your tire from the inside. With a single can, you may be able to inflate even a completely flat wheel long enough to drive it to nearby service station where you can finish inflating it with an air machine.
By putting these types of things in your vehicle somewhere, you will be prepared to handle a variety of tire troubles. Please note, that these solutions are only intended to hold you over until you can get somewhere and buy yourself a new set of Hankook Tires.