In college I took a class in color slide photography. One important piece of advice the instructor wanted to impart was... Caffeine causes shakes, so don't drink coffee before going out to take pictures. I get it, facts are facts. So I vowed to use a tripod. She could have her herbal tea in the morning... But nothing was going to stop me from that first cup of coffee in the morning. I have to have coffee before going outside, even if there's an earthquake (Whittier Narrows comes to mind). No way, never once, have I followed her advice.