This used to be impossible for me too. Even on adderall this would have been fairly challenging at times. Recently however my stress level was getting so bad that I started looking for ways to remain calm, even under extreme pressure. Long story short, I came across a book on Amazon called "Zen Meditation and Wisdom for a Better Life: A Gift to Busy People, Regardless of Religion".
I'm a skeptic when it comes to "Religion" type stuff, but meditation is one of those practices that has survived so long that I wondered if there was something practical to it. The main point in that book is that meditation has nothing to do with religion, it's a personal productivity technique. It's fundamentally about training your mind to focus on one thing for a period of time. It seemed interesting and I didn't have to buy anything other than the book I'd already purchased to try it. So I started doing it ten minutes a day, and let me tell you, the results have been impressive for me. It's nothing more mystical than the ability to really intensely focus on something, one thing, without letting your mind wander. If you think that's easy - give it a try, for just ten minutes. It's surprising just how hard it is to contain your mind for that long.
Give it a try, before long, sitting still for two minutes is so easy you won't believe it. As a side benefit you may learn how to relax at an unbelievable rate during those two minutes.