Last night, I had a lucid dream due to this “practice room” I found. it was basically my house, with everything wrong with it. windows in the wrong places, missing doorknobs, stairs that lead to nowhere, you name it. I opened this room at first and noticed nothing. but then someone explained to me that it was a “dream room,” and I decided to use it to practice spotting dream signs. instant lucid. 
I thought I’d mention this for all of you who are good at incubating dreams and/or have trouble noticing dream signs. potentially helpful.