In his book Afterlife Knowledge Guidebook:

Afterlife Knowledge Guidebook: A Manual for the Art of Retrieval and Afterlife Exploration (Exploring the Afterlife)
Bruce Moen discusses his process for visiting the various realms of the afterlife. It’s an interesting book and an interesting process. In his view, there is no OBE as a part of this process. It’s a mental shift to one of the Focus levels defined by Robert Monroe. It’s fascinating that these environments remain consistent for people. Further, Moen has used joint trips with others to verify his experiences. After an experience, they send each other their notes. In comparing the notes, they have found a high degree of correspondence between the experiences.
The method is discussed here:
http://www.afterlife-knowledge.com/contact.html
http://www.afterlife-knowledge.com/oobe.html
The thing is…the method is too simple for me. I’ve tried it once and had an interesting experience. However, given the nature of the experience, I can hardly conclude rationally whether the experience was “real” or not. It was interesting and it didn’t seem like I was making it up as I went along but it wasn’t a vivid experience, like an OBE is. It was much more like a daydream.
If you’re comfortable with getting yourself to Focus XX and then shifting your attention there, Mr. Moen’s process will probably work for you just fine. For me, I’m not confident about hitting specific Focus levels. Even my efforts with the Gateway CD’s have not been sufficient to get me to where I can recognize the various Focus levels.
So, this all got me thinking. (Unfortunately, I haven’t had time to try this out yet but I started thinking about Win Wenger’s Image Streaming process.) Win maintains that you are constantly receiving streamed information from your mind in the form of images (and other senses also). However, you learn early on in life to disregard these images. Win describes a process where you get yourself deeply relaxed. You then begin paying attention to the images you see in your mind’s eye (they may be colorful 3D images or they may be fleeting, faint glimpses–it depends on your own visualization skills). A key piece is that you then begin to describe aloud what you are seeing. This follows the principle that you get more of what you reinforce. Win suggests that you either describe what you are seeing to another person, or you do it into a tape recorder. He says that without the intent to describe what you are seeing to someone else, the reinforcement isn’t strong enough and your experience will be much less than it could/should/would be.
http://www.winwenger.com/imstream.htm
Finally to my point…What if we used Image Streaming as the gateway to these Focus levels? Win discusses the importance of surprise to get past your own internal censor. In his “Over the Wall” method, he teaches you to get new ideas or insights by jumping over a wall (or going through a door) at an unexpected point in the image stream. For this to be effective, it’s best to have someone help you or to have a recording that suggests you jump the wall at a certain point (you’re unlikely to know exactly when that is if you’re caught up in your image stream).
So, how about a protocol like this:
1. Relax deeply through whatever method works for you.
2. Begin image streaming. Either use a person or a tape recorder, or record into your PC.
3. If using a person, have them, at some point, suggest that you see a wall or a door. When you see it, they should suggest that this wall or door is the gateway to Focus XX and will provide you the opportunity to meet a loved one, do a retrieval, explore that level…whatever. If you are using a recording, give yourself 10-15 minutes of image streaming before the recording mentions the wall or door.
4. When prompted, go over that wall or through that door with the full intention of arriving in Focus XX. Keep describing what you see, people you meet, discussions you have.
5. Review the results later. Did you encounter anything verifiable? For instance, did you meet someone who you can confirm existed or did you find information from a loved one that is true but you would have had no way of knowing?
Good luck.