How can I push myself to stay up for the day?

I've been going to sleep at 6-8 am every single day from insomnia and it needs to stop! I want to stay up all day today so I can go to sleep around 9pm. What can I do to push myself to the night without being unbearably tired? Should I drink a lot of caffeine? Exercise or not exercise? Just want to make this a painless effort!