I work third shift what is the best thing to take to keep me awake?

I work third shift what is the best thing to take to keep me awake?
I have heard those bronchilators over the counter called two ways work plus try alot of coffee!!
I do not work third shift, yet I stay up late a lot. I use energy drinks and bright lights to keep myself awake, although you can get addicted to the energy drinks. Use at your discretion.
When I used to work third shift, getting enough sleep before my shift started worked well. And also a nice shower and a hot cup of coffee before leaving for work.
i don't know if this will work for you, but skip a meal. if u have been without a meal for about 4 to 6 hours before your shift starts, u'll stay awake. and if u feel hungry during the shift, and are afraid that if u eat u'll sleep -- eat fat free food, like bananas or melons. u can munch on these all u like. if u have cofee along with these, u'll not suffer from the side effects of coffee either.
eat a regular meal, once u r back from work.
all the best.