Smelling Made Everything Perfectly Vivid
I had my longest and most vivid LD last night. Normally, I have to stop myself and touch my surroundings to stabalize things or look at the ground and focus to keep the image from swirling out of view, but last night the clarity was incredible. This whole time I was forgetting one of my senses. SMELL!
I kept smelling this one person who smelled like vanilla and that rooted me into the dream so strongly. I think this was the first time my dreams had a smell.
I suggest that you have a predetermined smell for when you LD. I picked vanilla because I like that smell. Find someone or something, expect them to smell like said smell, and that should increase your hold onto the dream world.
Now that I'm writing this, I don't think I've tried tasting something ... that may get creepy but I'm gonna try it.