The second thing you can start doing as much as possible, especially after traveling somewhere, ask yourself how you arrived to your destination. Why would you do this in waking life? Simple answer, so you start doing it in your dream state. Doing this is called reality checking. A reality check is when you do exactly that, check your current state of reality for differences to what you believe to be waking life. Waking life is somewhat concrete, your hands have the same amount of fingers as yesterday unless you chopped one or two off, in a dream you may have 3 fingers on one hand, or 12 fingers on one hand. Also holding your nose in a dream and trying to breathe, in a dream it would be possible, in waking life it shouldn't be lol. Turning lights on and off, (not always true for me, if i consciously try to change a light in a dream it usually works). Now, if i am in a non lucid dream, changing lights that don't change is normally a sign that i'm dreaming.
So i guess what i'm trying to say is. CHECK YO SELF.
Leave a comment below with your reality checking methods!