To laugh most or to hear joyful laughter of others - a good omen. Such dream promises success to all your undertakings. Unlimited laughter foretells disappointments. If in a dream you laugh at failures of others, then, perhaps, your egoism will painfully wound your relatives. If you hear that laugh at you, then be afraid of diseases and disappointment in affairs.
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.