A couple small touches that have helped me power through these interviews: - Food intake prior to the interview. If I get phone interviews later in the day, es

A couple small touches that have helped me power through these interviews: - Food intake prior to the interview. If I get phone interviews later in the day, especially after lunch, I avoid eating heavy and greasy food that can put me in a food coma. It has negatively impacted my performance in a couple of interviews back during my college days. Controlling my caffeine consumption before an interview helps too. I had a pretty bad "crash" in one of my onsites. - If I'm expected to do puzzle questions, it's best for me to warm up 45 mins before the interview just to get my mind in a problem solving state.