This is a hot to on creating a (somewhat) accurate viking costume.
Step 1: Planning makes perfect
Well the first stem in any sort of thing like this is to know what you plan on doing. so here are my plans.
Before we get any farther let me clear up one common misconception.
VIKING HELMETS DID NOT HAVE HORNS
Horns were not on viking helmets, horns would have gotten in the way. imagine this, every time you bring your sword over your head you knock off your helmet, sounds like a good idea to get rid of this problem doesn't it. Horned helmets came from Opera not history.