11. Do you often remember your dreams when you wake?
Routinely. I have spent decades of diligent effort learning how to navigate between dimensions both inner and outer, and to carry things from one to another. In sleep, ideas are heavy. It's like trying to carry rocks in a wet paper towel, underwater, swimming toward the surface. Sometimes if one tears through, it's possible to swim back down and retrieve it, but this too takes practice.
In college, a professor read me a poem that talked about falling asleep as descending in an elevator, and going past "one bright floor" with all sorts of exciting things going on, that he never got more than a glimpse of. I was utterly baffled. My teacher asked why. I pointed to the line and said, "Because that's where I get OFF!" I just couldn't imagine anyone spending his life noticing that floor, but not bothering to learn how to operate the elevator buttons.
There are many ways to learn about mystic sleep and dream skills. Dreaming is a huge part of the indigenous religions in North America and Australia. Some good instructions may be found in yoga nidra, which spans both meditation and sleep.