I would just be sure to combine it with another technique (or two, or three). Try pinching your nose shut and inhaling...if you can breathe through your nose, you're lucid. Also, look at your hands and see if you have the correct number of digits. Also, try putting one finger through the palm of your hand. Also, try looking at a digital watch/body of text to see if it changes. It would be good to get in the habit of rubbing your hands together, though. That way, you'd be more likely to remember it in a dream. On it's own, though, I don't think it would make you lucid, but I could be wrong.
Good luck, and keep us posted!
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