I think what he's trying to say is, you shouldn't try to get yourself in the mindset that you're always dreaming. I agree, if you actually train your mind to always assume you're dreaming, you may do something dangerous. Although I'm not sure that's even possible, whenever I do a reality check, I'm pretty sure I'm awake. The problem is, in a dream, I never question my reality. The fact that I am able to question my reality at all is a likely sign that I am awake.

You may want to just do your RCs as normal so that it becomes habitual. I'm not entirely sure that it's crucial for you to be that skeptical about your environment, rather you just want to make it part of your routine. Since dreams often take on the subject of something you did that day or often (I.E. I was playing Majora's Mask last night and I had a dream that I was at work, having to play a song on the ocarina to replace steps on the staircase because some were missing... oddly enough, lol), it makes sense that doing reality checks every day will make a reality check happen in your dream. If I were you, I would simply continue with normal methods, since it's been proven to work.