If in a dream you become the witness of accident, then in real life to you there will be some unforeseen events which, however, will not do you special harm. If dreamed you that accident concerned directly you, then in reality you should pay special attention to own health, otherwise you risk to sadden the existence for a long time.
Be sure and keep any other thoughts out of your mind before drifting to sleep as a cluttered mind can decrease the chances that you will remember your dreams upon waking. Also, focusing on remembering your dreams upon waking in the morning is another very important thing. This sounds very easy, but is often hard for some to do. Interpret a dream by "dictionary dream of interpretation"
When you very first wake up, simply think about your dreams. Don't allow your mind to drift off to other things, just lay there and think about the things you dreamt about the night before - dictionary dream meaning.