Well, I do not recommend the "write something on your hand reality check" - personal preference. I would recommend you to work on general awareness on your daily life, when something odd happens and at random intervals of the day, do a reality check. But don't just RC, really question your actual state; are you awake or dreaming ? Take a look arround, think about you have done in the past minutes, can you remember something ? Then proceed to reality check, I, personally, use the finger counting and nose pinch reality check, where you pinch your nose and try to breath, if you can, you are dreaming.