We all are different. Some of us are like lark and are most productive during the early hours of the day. While there are some whose productive hours start post ten PM. I am a lark. I like to start my day as early as 4_5 AM and I stay most productive in the first half of the day. My energy level and productivity starts dropping by late afternoon. How about you? Are you a morning person or night person? Are you lark or owl?