What do you think keeps you from being productive?

I guess I forgot about "lack of sleep". I guess it really affects overall performance of a person, I can't imagine not having enough sleep and doing something really difficult in the morning. I could remember the story of my brother, he is a medical technologist and he said that the day before he drank strong coffee. He wasn't able to sleep and then the next day he was not functioning well, he even asked his colleagues to do the blood extraction for him because he wasn't confident because of being sleep deprived. I couldn't imagine what could have happened if he insisted on taking the blood out of a patient in that condition. I guess I forgot about "lack of sleep". I guess it really affects overall performance of a person, I can't imagine not having enough sleep and doing something really difficult in the morning. I could remember the story of my brother, he is a medical technologist and he said that the day before he drank strong coffee. He wasn't able to sleep and then the next day he was not functioning well, he even asked his colleagues to do the blood extraction for him because he wasn't confident because of being sleep deprived. I couldn't imagine what could have happened if he insisted on taking the blood out of a patient in that condition. So sleep is really important as well as peace of mind, I guess. Thanks for the response, apologies for a very late reply. Have a great mylot experience ahead!