Vegvisir ("the viking compass"). It is said that if this sign is carried, one will never lose one's way in storms or bad weather, even when the way is not known. It is encircled by protection runes. This would be a cool tattoo.
I have made endless mistakes in my life, but everything has happened for a reason and I would never change a moment of my life for anything. It happened because my life should have happened the way it did.