As the others have said and you can't stress enough be careful. Make sure you have a good fire extinguisher on hand and ready to use. Once you have a fire, not a good time to be running around looking for one.
-Fill pot with water and lower frozen turkey in so you can mark proper level to fill with oil.
-Make sure turkey is completely thawed and dried, real important.
-Turning off the flame before lowering turkey in is a great tip.
-Lower it in slowly and wear good gloves if you have them.
-12-14 lb. turkey is best size for this.
-Make sure you haven't had to many adult beverages till after its done.