If dreamed you that you eat oysters, then in real life you risk to rely on false values. To trade in oysters means that you are not always picky in the choice of means for achievement of the goal. If in a dream you consider oysters, then in reality you are expected by comfortable life and many children.
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.