OMNI - April 1987 had a great intro to lucid dreaming, with very practicable steps. This article alone started my dreaming way back then.

There was another on astral projection that came out about a year later, however I am not sure the exact date of the issue, but it was also fantastic, and introduced me to astral projection way back then.

Sorry I dont have more details. I may have the magazines tucked away in a bin somewhere...