Why writing it 18 times works
The 369 method asks you to write one affirmation three times in the morning, six at midday and nine at night. The numbers come from Tesla, but the reason it works is duller and better: repetition at spaced intervals is how anything moves from something you know into something you assume. You are not informing the universe. You are wearing a groove in your own expectations.
Choose one affirmation and keep it for the full cycle — usually 33 or 45 days. Write it by hand where you can. Say it under your breath as you write. If you miss a slot, write it late rather than starting over.