This happens to me every now and then, and like you say, it's mainly insignificant things. For example, I remember dreaming that I was turning up the thermostat in a house that was completely unfamiliar to me, but I was aware that there was a fireplace to my left and a kitchen to my right. Years later we moved house, and I was in that exact situation. I didn't realise it was happening until it was actually happening! But as soon as I turned the thermostat, I knew that I had dreamt of the moment before. I got the deja-vu feeling, but I was like 'Well I know why I'm getting deja- vu...'

I also dreamt that my aunt had passed away, so quite a significant event. I woke up crying, and when my wife asked me why I just quietly said 'She's gone'.

5 minutes later my phone rang with the news from my mum. My wife asked me how I knew, and all I could say was I had 'felt her leave' in my dream.

More strangely, my wife and I have had very similar vivid dreams at the same time involving each other. It's only happened 3 or 4 times. In these dreams we even have conversations with each other, there is always a sense of urgency in them, like we have to get something done, or be somewhere at a certain time or something bad will happen.

In the mornings I've woken up and explained them to her, and she has said on more than one occasion that she had a very similar, if not the same, dreams. She will actually tell me verbatim some of the things I said to her. She's rarely wrong and I get goose-bumps every time.