Well, I got the idea from Lucid Dreaming for Beginners by Mark McElroy. He said something about matching up certain scents to certain people, and spraying it on his pillow, so when he lucid dreams, it would be easier to meet them there .... or something like that. And he said it worked for him.

So, maybe it'll work in my case, maybe not? I'll let you all know in a few weeks when I try it out. If it doesn't work, I'll probably try sounds next, like you said.

~ thanks for replying, btw