Nordic Funeral

One final significant ritual of the Norse is that of burial and funerals. Nordic Funeral rites often consist of cremation or burial. Cremation is the more favoured method and remains are often buried with a form of transport be it a horse, a wagon or a boat. Little is known of the rituals that take place during the burial and the cremation.

Draugr

The Nordhani believe that a dead that doesn't get buried/cremated properly, drowned, or gets buried in a non-horizontal position, can become a Draugr.
Draugr are undead bodies with superhuman strength that can shift their size at will.

History

Thus he ( Tyr ) established by law that all dead men should be burned, and their belongings laid with them upon the pile, and the ashes be cast into the sea or buried in the earth. Thus, said he, every one will come to Valhalla with the riches he had with him upon the pile; and he would also enjoy whatever he himself had buried in the earth. For men of consequence a mound should be raised to their memory, and for all other warriors who had been distinguished for manhood a standing stone; which custom remained long after Tyr's time.

Execution

A prominent tradition is that of the ship burial, where the deceased was laid in a boat, or a stone ship, and given grave offerings in accordance with his earthly status and profession, sometimes including sacrificed slaves. Afterwards, piles of stone and soil were usually laid on top of the remains in order to create a tumulus.
A Viking funeral could be a considerable expense, but the barrow and the grave goods were not considered to have been wasted. In addition to being a homage to the deceased, the barrow remained as a monument to the social position of the descendants. Especially powerful Norse clans could demonstrate their position through monumental grave fields.

Components and tools

It was common to leave gifts with the deceased. Both men and women received grave goods, even if the corpse was to be burnt on a pyre. A Norseman could also be buried with a loved one or house thrall, or cremated together on a funeral pyre. The amount and the value of the goods depended on which social group the dead person came from. It was important to bury the dead in the right way so that he could join the afterlife with the same social standing that he had had in life, and to avoid becoming a homeless soul that wandered eternally.
The usual grave for a thrall was probably not much more than a hole in the ground. He was probably buried in such a way as to ensure both that he did not return to haunt his masters and that he could be of use to his masters after they died. Slaves were sometimes sacrificed to be useful in the next life. A free man was usually given weapons and equipment for riding. An artisan, such as a blacksmith, could receive his entire set of tools. Women were provided with their jewelry and often with tools for female and household activities.