When our ancient predecessors prepared for death, the tomb would contain items that they could use in the afterlife. In the past I have found that to be odd. I would often think upon hearing such things, “why would a dead person need material things?”. They knew what was to come, because they understood the unconscious. Death and resurrection is something that we experience every day.
If there is one thing that I have learned about dreaming, it is important that when you prepare to enter the unconscious (sleep), prepare as if you were preparing for a journey. Dress accordingly, gather the things you may need, or want to bring, and when you close your eyes, prepare to dream.