From my own experiences, the key is to not make RCing and being aware a chore, but more of a spontaneous thing that you do when you remember to do so. RCing without a cue is probably more beneficial because cues probably won't show up in your dreams, including alarms or notes. You should also avoid making everything into a habit. Don't just RC and then brush it off; explain to yourself why you aren't dreaming, and what things might look like if you were. This keeps you on the lookout for strange things and helps raise your awareness of your surroundings.