These summer days it gets pretty hot in my room so i decided to turn on a fan and let it keep running while i sleep. The last few days i have gotten lucid as i tend to wake up by myself a couple of times. I don't know if its the fan blowing on me as i start to fall back in sleep, but i keep falling between sleep and wake so i immedietly know that im dreaming.
Perhaps this is something you can try and see if you get lucid easily.
Good luck