I once had a dream inside a dream.....inside another dream..... But seriously I had a dream where I was in a swimming pool and I didnt have enough air to make it back to the surface so I took a breath in underwater and found out I could, in fact, breath, which lead me to believe I was dreaming. I swam around underwater, breathing. I pretended I was a potato.

Just don't phone your own number.

Kitchen sage can be made into tea and be used for lucid dreaming, its active ingredient is thujone or absinthol.