While the spirit does not require the rest, the physical body does - that is why we sleep through the night.  Dreams, sleep states are not for 'working' on self in any way.  There is a commitment of time and energy that can be made from the conscious state of consciousness rather than one that is altered.

While experimenting with this and that is a method to be used - sometimes following a pattern of exercises that have been tried and tested would help as well.  These exercises include the attunement process for each and every person to reach their own personal spirit guide and gain that relationship of friend and partner.

I totally agree that the body restores itself during sleep. There are 5 stages of sleep and three waves associated in sleep patterns. The theta waves, the delta waves and the alpha waves.  When we enter sleep, and travel through the theta waves we sink deeper in the sleep state until we reach the delta state which is the deepest stage of sleep. It is here that our bodies regenerate itself. This is the period in which we do not dream. Our bodies is solely focused on regeneration. It normally takes almost three hours to even get to the deepest state of sleeping. The lightest stage is the alpha stage and this is the stage where we dream. This is also the stage in which our blood pressure,breathing,brainwaves, and heart rate rises and we enter in sleep paralysis.    Dreaming is also vital for our health, this is where we work out the stresses in our lives and release tension.  This is also where our prophetic dreams come from.

If you are a prophetic visual person you can not prevent this from happening, you can enhance, but you can not prevent. We are designed to dream from birth. Leonardo Divinci designed the first airplane and sumarine from his dreams, and Julias Verne worked out the distance between the earth and the moon and also had predictions come to pass from dreams.  I myself as a child predicted an untimely death through the alpha state.

By meditating before sleep, we bring in more oxygen to our bodies, enter a deeper state of relaxation by calming the mind and can enter that restoritive Delta stage of sleep at a faster pace and also stay there for a longer stretch. (Delta only lasts up to 30 minutes. Thank goodness we cycle through the stages.) Meditation before bed is recommended by doctors, psychologist and the spiritual community. As pertains to the guides, it is a good quiet moment to make your intention known. Our guides have only our best interests in mind and will not interfere with our health or needed sleep. If you do happen to awaken in the middle of the night to your guide, your sleep stage was more than likely in the alpha state and your body in the process of awakening naturally for example for a night time trip to get a drink of water ect. By no means will anyone be doing nighttime psychic work because of a guide. lol I love my sleep too much!

I might add....there is a lot of information on psychic, mediumship, paranormal, metaphysical, etc. that has to sifted to find the wheat from the chaffe.  When you use a method of 'do it yourself' the job falls to your own methods of connection and communication with spirit and what works for you.  When you use a method of finding a good teacher and following the exercises and techniques it can be a smoother operation.  You have free will to choose.

good information
i had my many dreams came true.sometimes i use to sense how many letters coming to me today also is coming in my dream.it is really a wonder for me.i get dreams of meeting people etc.& it happens also meeting them.that's strange right!

Mediumship is best understood in an alert state of mind.  Meditation uses the alpha state.  At that state we can be alert to the mind and develop good habits of mediumship.