A universal principle for success that I have found that is great to take into consideration is the truth of:
"The importance lies not in what you do, but how and why you do it"
That means that it's often the state of mind and mindset behind the right action that is more effective to focus on than the action itself.
In this case I would say that the state of mind that you want to be in is AWARENESS/ PRESENCE/ MINDFULNESS/ BEING IN THE NOW
and the mindset is CRITICAL THINKING.
The reason for why the state of mind of being in the now is important is scary to think about. Most people are actually living their life like it was a dream, controled by their own psychology and thoughts, not actually using the prefrontal cortex of the brain that governs will power (that separates us from animals). And if you are a slave to your own mind during the day, you are most likely going to be a slave to your mind during the night as well. This is what the movie Waking Life talks about. And it is shown that people that have a higher activity in their prefrontal cortex actually experience more lucid dreams. I could talk about this for hours but a simple way to get more will power and higher prefrontal cortex activity is -> Meditation.

(See my guide in my signature)
And watch this:
https://www.youtube.com/watch?v=9n6oBUkv6oU
But the most important element for awareness of dreams is not that you perform a reality check during the day, but the fact that you actually are aware of the possibility that what you are experiencing right NOW will feel real but can be a dream. This mindset is not achieved by thinking about it, that is just theory, you need to KNOW. This is achieved by experiencing moments where you believed that what you were experiencing was real, only to wake up and realize that what you just experienced was a dream. Just like the matrix, it can't be explained, it has to be experienced!
It is possible to fall asleep and then dream and randomly realize that you are in a dream, but in my experience there is a better way of doing it, intention.
Look at your hands before going to sleep -> Fall asleep -> Wake up (naturally or with an alarm) -> Remind yourself that the next thing you experience most likely is a dream -> Fall back to sleep.
Reality checks during the day is in my case not very effective. During the day for me the only thing required have been awareness of being in the NOW and not in the thoughts (also called presence) and at the same time being aware of the fact that even though it could feel real it could be a dream. And this thought alone would make me lucid because my dreams are usually not calm, quiet and "boring" as physical reality, there is most likely something strange going on. It doesn't hurt to throw in a reality check here of course, but for me it's not really relevant and here is why:
To just reality check out of habit is good of course, but in my opinion the reality check itself is not what's important, it's the critical awareness that is.
Critical awareness alone have made me wake up in a dream, because if I am thinking critically and see a big space ship in the sky, well then I am
already aware and THEN to verify I do a reality check, sometimes the reality check is not even needed I just become aware and remember the feeling of dreaming and realize that it's a dream. But I have also had instances where I did a reality check saw 6 fingers on one hand and treated it like it was normal. So you see it's not the reality check that's most important, it's the critical awareness itself.
So we start as a prisoner of our own mind (a zombie) just on auto-pilot following our thoughts and emotions and circumstances of life, then we become aware which means that we are in the moment, then we become critically aware and reality check to test where we are. It's the evolution of consciousness experienced and re-experienced!
Just something to keep in mind.
But other than that, any reality check that works as a way to test reality is fine.
Peace!
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