This happened when I was around 10 years old. I couldn't fall asleep and around midnight after struggling for three hours I woke my mom up and said I couldn't sleep. She told me to count sheep. I asked her how this process worked. She explained that I imagine sheep jumping over a fence and keep counting them. I counted till ONE THOUSAND THIRTY SOMETHING. Then I stopped.I concluded that this process does not work, atleast not for me. How could anyone busy with numbers fall asleep? I fell asleep after that.