How to pull an all nighter.....,plz help?

Ok so I have to go to get a haircut and outta town and I have insomnia where the only way I get sleep os ping out from being tired. And I can't just set my alarm cuz I know I will sleep through it. So what are some tips to stay up during the day so I don't fall asleep in the car or at the hair ppl also wht are some foods tht could help me