This is a real cool sensation. When you are laying in bed, and in a reflective state, think of the last place you lived and were laying in bed and in a reflective state in the same position. The time between those two experiences will fall away and it will feel like you are in that other bed. You have just separated yourself from your physical body and are now soul traveling.
Continue from that experience into the bed in the place you lived before that. Notice your orientation of the bed to the door is different as it is on a different wall. Relive the experience of what it is like to be in each bed. See how similar that reflective state is in all of them; that that is the commonality of each experience. Feel how easy it is to switch from one bed to another.
Play with this visualization as a means to get out of the body. Once you feel completely like you are in a different bed, get up out of that bed and go out the door in that experience and create an adventure of your imagination. The imagination is a jumping off point into the more intangible realities and truths. This is similar to a technique that Einstein used to gather information about things he could possibly not know in the physical arena. Go visit someone that has crossed over and you would like to see. Imagine meeting them on the other side of your bedroom door.
If it feels too scary to get up and walk away, just allow yourself to view yourself from a position where all the experiences of being in bed, in that position are all happening at once. Then, simply let them all fall away and realize that you are still you, after it is all pulled away; even the current bed you are in. Again play with the experience and see where it takes you.