This interesting column discusses some of the different facets of the dream state, including how to create, prevent and remember them.
For instance, controlling your environment by leaving the lights on, having a fan blow across your face and even having a loved one open a bottle of perfume under your nose while sleeping can induce dreams.
How much of a dream you remember, on the other hand, depends upon how soon you wake up afterward.
Nearly 80 percent of those awakened during REM sleep both remember that they are dreaming, and can recall much of the content of their dreams. Those who awaken as little as 15 minutes later, however, often cannot recall anything at all.