First thing to do is clean out the wound. Doctors say to flush it out with clean water for at least 3 minutes. If you have a first aid kit, use some iodine to help clean it out.
Next, take a needle and hold it over a flame. Thread the needle with whatever you can use. Fishing line would be great here.
Okay, time for the real pain. Take your needle and begin sewing as far away from the cut as the wound is deep. Cut it off and tie a knot every 1/4 inch.
Now, take whatever you have for a bandage and wrap the wound.