I've been meaning to do this myself: Get a digital wristwatch and set it so that the alarm goes off at the top of every hour. When you hear the beep, do a RC. It doesn't matter what kind of RC you do. Just remember to ask yourself, "Hey, am I dreaming?" and then do a RC to justify your answer.

If doing that at the top of every hour all day every day doesn't make doing RCs a habitual thing...I dunno what will.