There are many type of dream practice. 

1. Record and analyse your dream
2. Lucid dreaming observing
2. Lucid dreaming creating / exploring
4. OBE

But it all start with a practice of awareness
during the day, then during the night. It then
helps writing your dream in a journal (or on
gopher.) 

The first step is dream analysis. It has a 
many benefit, from emotional intelligence 
development to deep understanding of the self
and healing of past trauma. 

The second step is lucid dreaming where you 
are aware that you are dreaming and letting 
the flow of the dream continue. This helps
working with the symbolic of dream, and also
help retain more information about the dream. 

The third step, the creative lucid dreaming is
when you start doing things in the dream. In 
this state your 'dream body' is more 'solid.'
You decide what you do and how you go about it. 
It's a place where you can do meditation 
practices, and it's an essential step for obe.

Out of body experience are then easily attained
once the lucid dream is under control. In that
state there are many exploration that can
be done. It's a deeper exploration of reality
and will also offer a different perspective
on the world around us. 

In Tibetan Dream Yoga, the goal is to practice
for the moment of dying in order to be able to
reach enlightenment at that point. 

In Shamanic dream practice, one of the goal
is to attain a deeper understanding of the 
reality we live in and the other entities that
populate our world that are harder to see
in our waking day. It's also a path of power
where teachings can be received in the dream world. 

In the yogic perspective, to be able to practice
during your dream state helps develop a more solid
awareness and give you a lot more time to focus
on your practice. 

In the non-dual perspective, the dream yoga and
OBE is simply an exploration on Conciousness. It
helps with the Realization of the Self, and that
we are all This, which exist within itself. A 
OBE is not a out of body, but simply an experience
beyond the normal perception of our localisation in
space and time. 

Different layers of awareness in the dream

The different layers of awareness
in the dream are interesting: 

- You can be unaware and not even 'in'
your dream (it's like a tv show.)
- You can be in the dream and 
unaware (you are the main actor). 
 -You can be aware without being the
actor (you know you are dreaming 
but it's more like a show) 
 - You can be aware and being the 
main character.  With strong awareness
the dream will have a tendency to freeze
just before waking up. In this moment
everyone in the dream stares at you.  
 - You can be aware but keep it subtle
(the dream continue to develop and you
can roam in it)
 - You can be aware and completely
be in control of the dream. It's like
minecraft in creative mode.