When I'm desperate I go for energy drinks. Usually Mtn. Dew Kickstarts. If I am really desperate and need a quick major boost, I'll go for a Red Bull (even though I know I will crash). If I'm mostly awake and just need a small push, a Dr. Pepper is fine.
But I try not too, I have to really need it. I go for making sure my sleep hygiene is in check so I don't need it, but we all have those days. Mainly the weekends for me since I'm lax on taking my meds on schedule.