My productivity hack? I code in the shower and use a water whiteboard. I have to be up very early and feel the most clear headed right when I wake up.

If I'm stumped on something, I can usually tackle it from a new perspective. For the most part it works out. Other then the occasional profanity if I accidentally erase something and the sometimes longer than usual showers, my wife doesn't mind. Usually because it's 5 in the morning and when she takes a shower there is this scribble that she tries to decode!