If you are, or have ever been, an entrepreneur, there is a really good chance you didn't get the recommended daily allotment of sleep for that period of your life. So you problemably drank a little more coffee, Mountain Dew, Red Bull, or whatever during that time.
Now you have an alternative. There is a gum called Mad Croc that has caffeine and all those other energy drink ingredients. I saw it at Target so of course I had to buy it and test it out. It tastes pretty good, and I did notice a small boost in energy, but when the initial taste wears off the gum has a very strange flavor. Note that some people didn't like it at all. Nonetheless, it's decent enough that you might want to buy a case for your next startup.