I recently purchased, and received this weekend, a tire patch kit from Stop and Go.
www.stopngo.com/
It's a tire plug kit that uses the rubber plugs with the mushroom on top. When I used to work for a service station we used this type of plug and they work really well and you won't get that slime mess on the inside of your tires/wheels. The kit appears well equipped, all you're going to have to stick in the kit is a pair of pliers to pull out the offending nail/screw and to pull the plug snug against the inside of the tire. Use your portable air compressor to fill up your tire. I don't recommend the plug as a permanent fix, get the tire patched on the inside as soon as you can. I did notice that over time the hole in your tire will become the same size as the plug which, to me, isn't good.