In my lucid dreams I can't feel water in my mouth while drinking. Now I have a drink every time I get out of bed, if I don't feel the water in my mouth I know I am dreaming and I can take over my dream from there. Unfortunately, so far, I don't seem to be able to allow myself to break the laws of physics in my dreams, I can't fly or any other cool superhuman stuff that I want to do in my dreams. They tend to be terribly life like (boring). I also have difficulty breaking my own moral compass in my dreams, when I get close to doing so I wake up, this can be a particularly frustrating limitation.