Given the fact that most warriors didn't wear any armour at all, you've pretty much got free reign...
Plate mail was not invented, and chain mail was very, very expensive. What was more common, and what lends itself very nicely to cool artwork, is leather scale mail. It is heavy as snot to wear (trust me!), but oh so functional, and can be made to look very awesome. This one guy I know has made his "shoulder pads" into the shape of skulls. You can emboss the leather and shape it to do funky stuff like that.
Shoes were very simple, and legbindings were quite common in the eastern areas (Sweden, Rus etc), whereas the western parts wore hose (no binding necessary. Cheap bastards.) Fur was good on cloaks and headwear - that looks good in pictures, too, but it's too fucken hot in battle (especially with mail on). The top part of the body wore the decorations. Waist and down was for weaponry, such as axe, sword and the inevitable scramasaexs (sp?). It hangs off the belt, horizontally, not vertically. We tend to use bracers when we fight, but I don't know if they're really "period" or just something we do because it's in the rules (you get hurt badly when some guy takes a rattan chunk and smash it into your forearm... Then again, we're probably not as good at fighting as someone who grew up with a sword in hand in that era!). The scale mail goes part way down the arms, to the elbow. You want to expose as little as possible of the arms. Trouble is that armour is so fucken heavy and expensive that it's pretty much reserved for rich dudes that fight on horse back. Everyone else just steals whatever armour they can get off the slain dudes if possible - then the armour isn't Norse, and I'm guessing that it is Norse armour you want, huh? Anyhow, that's just generic Norse armour, but you can pretty it up for someone like Odin. To be honest, I can't see him in anything but scale mail with a nicely fur-trimmed cloak hanging off the one shoulder.
Oh, don't forget the shield (round), and Odin likes his floppy hat, according to the stories. It's a felt thing with a wide, floppy brim.