Never fear, I'm desperately impatient too
One of my midwives recommended this:
Pick a date (done). Get a pen and piece of paper and write it down: I clearly see myself birthing my baby on Monday. (you can add details if you want, like "my 10 pound baby" or whatever). Say it out loud and visualise it. (just pretend you're a hippy for a minute)
Put the piece of paper under your pillow and add another each night till you have your baby on Monday.
She reckoned it worked in around 80% of her clients.