All the dreams do not have similar effects. Outcome of some of the dreams begins to manifest within a few days whereas others might take months or even years to show their outcome. It is generally believed that only those dreams have effect, which we have during deep slumber. Those dreams that we have during short nap are usually ineffective. Thus, time of the dream is equally important. In any case, correct interpretation of dream helps us to condition ourselves physically and mentally to deal with the ensuing circumstances.