Though I have never really seen or heard a ghost consciously, I think I might have had some ghostly experiences. Every once in a while I happen to dream strangely realistic, which you would probably consider to be quite normal. The strange part is that those dreams came true a number of times, but then in a different context.
The first time it happened I was about 7 or 8 years old. At the time I would go iceskating every Saturday and along with other neighbourhood children we would be picked up by a bus. I once had a dream, which was not frightening at all, about missing the bus. A few weeks later I indeed missed the bus. This could be seen as coincidence, but it happened more than just once.
When I was about 8 or 9 years old, my mom got a new boyfriend and we were going to move into his place. He had a 4 year old daughter, who is now my stepsister. Though I had never met her before I dreamt about a blond-haired little girl with some kind of eczema. A couple of years went by and I had almost forgotten about the dream, when my stepsister developed a kind of eczema.
A couple of years later when I was about 12 years old I dreamt about arriving at school too late. The teacher whose class I missed was my geography teacher. Some time later, when my geography teacher had become my mentor, I really ended up being late, for his class. I had been ill for a period of three days and in that time my schedule had changed. Usually school would start at 9.30 on Monday morning, but the new schedule started an hour earlier.
About a year later I had a dream of which I can only remember one sentence. It was 'This is Romy, Tiger's replacement.' Tiger was the cat we currently had and I had a sports coach named Romy. At the time this sentence didn't make sense at all, until Tiger passed away a year later and we bought a new cat. We did not name her ourselves, the animal shelter where we got her had already given her a name. Her name was Romy.
The descriptions of dreams listed above are all of the most clear examples of my predictive dreams. I do not know what caused me to have these dreams, though I have considered the option that a spiritual being might have influenced my dreams.
I would like some comments that could explain why I am having these predictive dreams, because it scares me sometimes, when I have a realistic nightmare, because then I think it might come true.
I know with mine I began in 2002. But the more I typed, the more I remembered. I ended up remembering the first thing that happened to me (ghost-wise) when I was 13. I now (at almost 49) have over 100 single-spaced typed pages. But my Journal includes my ghosts, premonitions, visions, etc as well as my kids' experiences.
As val recommended, write down the date. Most of mine have the date (if I forget the exact day, I at least get the month). At the time you may not realize it, but later on it may become important. You may forget a month or two down the road that you had the dream, until it happens. Then, when you look back in your journal, you realize...OMG! I dreamed that on this date!
Anyway, you're welcome and best of luck to you π