Here are some noting categories taught by Kenneth Folk:
1) Objectify body sensations. If you can name them, you aren't embedded there. Notice sensations and note to yourself: "Pressure, tightness, tension, release, coolness, warmth, softness, hardness, tingling, itching, burning, stinging, pulsing, throbbing, seeing, tasting, smelling, hearing." If I am looking at something it is not "I".
2) Objectify feeling-tone. Are sensations pleasant, unpleasant, or neutral? If you can sit there for five minutes and note pleasant, unpleasant, or neutral every few seconds, you are not embedded at that layer of mind.
3)Objectify mind states. Investigation, curiosity, happiness, anxiety, amusement, sadness, joy, anger, frustration, annoyance, irritation, aversion, desire, disgust, fear, worry, calm, embarrassment, shame, self-pity, compassion, love, contentment, aversion, dullness, sleepiness, bliss, exhilaration, triumph, self-loathing. Name them and be free of them. These mind states are not "you;" we know that because if there is a "you" it is the one who is looking, not what is being looked at.
4)Objectify thoughts. Categorize them: planning thought, anticipating thought, worrying thought, imaging thought, remembering thought, rehearsing thought, scenario spinning thought, fantasy thought, self-recrimination thought. Come up with your own vocabulary and see your thoughts as though they belong to someone else. The content is not relevant except to the extent that it helps you to label and therefore objectify them.