If in a dream you see unnaturally big cockroach, then in reality you are disturbed by some thought which you cannot get off in any way. Actually, you have nothing to be afraid. The dream in which you try to etch cockroaches, but them on the contrary becomes more and more, means what owing to certain circumstances at you will increase cares and duties, however it will not upset you too as they will bring you satisfaction. If dreamed you that you enter the dark room, you turn on the light and you see the cockroaches who are running up in different directions, then in real life you need to refuse doubtful pleasures for the sake of the own benefit.
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.