Hey uh dreamless anon taping your mouth shut “to dream” is a /really really dangerous thing to do/. You could suffocate yourself in your sleep, you could choke, many, /many/ bad things can happen. That isn’t worth it for a dream. I promise. To dream you have to get to REM sleep, aka deep sleep. Try to go there, please don’t tape your mouth shut.

Yeah, guides on Dreaming and Lucid Dreaming are about the more psychological things- Mediation, thinking hard about stuff, keeping a Dream Diary when you start Dreaming… Postion can influence your dreams, but one thing is shifting your position, and another one taping your mouth shut like, jeeeez.