Yesterday I attended a seidr-themed workshop about divination / oracle "under the mantle" with Linda Wormhoudt in Amsterdam. It was a very interesting day. Linda told us a lot about the methods of divination used in Northwestern Europe. It is too much to share it all, but I'll let you take a peek. :-)
For example, Útiseta/útisetta literally means "sitting outside" and 'sitja á haugi' means "sitting on a burial mound". The practitioner or 'vala' retreated to a place in nature, covered herself with a mantle, blanket or animal skin and just sat there. Singing and praying she tried to get into contact with the dead (ancestors) to seek information and/or advice. Unknown how long exactly, she just came back when she had an answer.
We tried it ourselves. At first I didn't feel comfortable at all covering myself. I struggled to find the right position for me. Then suddenly I found it and I surrendered myself. I had gone in with a question and almost immediately I got answers, or at least tips / clues. I can't really ecplain, you have to experience it!