I suffer from psychosis. I see, hear, and smell things that are not there. I take a plethora of medications to curtail the psychosis. Unfortunately, I still experience episodes.
There was a reoccurring instance where I thought people were breaking into my house. I usually froze in bed unable to move wondering if the robbers would find me waiting hours to no such instance.
It wasn't until I placed my machete next to my bed that it stopped. It is rusty and dull but it is pointy!
For me it is acknowledging what I hear, see, and smell. I tell myself breathe, relax, and usually out loud state you are not real this is just your brain. Plus I can poke the robbers and they can get tetanus.