Having enough sleep will really make much difference on my efficiency. Comparing with yesterday which I had 7 hours of sleep the night before, my efficiency is dropped today which I had 5 hours of sleep. Without enough rest, my mind will just keep wandering around, not being able to focus. The motivation to work is less. Also I would want to find a place to sleep during lunch time.

With enough rest, I can work non-stop...Yesterday is the most effective day I ever have for the past month.

If the weather is cool as last week, I will even be even more intended to sleep earlier.

Maybe I am really....渣... such that I need to have enough rest.