I'm no way near an expert but I have for years kept dream journals (burnt most of them last year as want to travel & slowly getting rid of my belongings) I love to interpret my dreams & sometimes others aswell, i find the colours in dreams are really important, it usually is the small symbolic things that bring the biggest messages from our subconscious mind, a little bit like body language (Which I also study) the small things are what give you away.
I get my premonitions through my dreams, I was about 10 I think at the time of the 9/11 but I dreamt about that & for a kid it was a pretty scary dream,I have seen passed over loved ones in my dreams, I have often met people in my dreams who I've then gone on to meet in waking life, most of my friends in secondary school I met in dreams before hand.
Our body needs sleep to re-energize our organs but our brain never really stops but we need to rest some more than others some don't need alot of sleep, it depends on how stimulated you are in a way. Dreams help us heal like it sais in this article I've posted here, but we should play close attention to our dreams they often portray messages to us.
They can simply just be memories from the day, week, month or even the year, the most significant & your mind is going through these in your sleep to help you heal & remember & understand what has happend. Memory is a funny thing isn't it.
We often hear people say 'I don't dream' to me that's like a heart stopper because we all dream it's just whether we remember it or not, it's a process we have to go through. <3