For me, the big one is sleep. My productivity seems to increase in general. Here are some techniques: - If we go to bed late, just wake up late - Sleep in a d

For me, the big one is sleep. My productivity seems to increase in general. Here are some techniques: - If we go to bed late, just wake up late - Sleep in a dark room. Close all curtains. Reduce the sunlight in the morning. Actually, don't let external triggers to wake us up (e.g. morning's sunlight, alarm clock). If our bodies want to wake up, they'll wake up by themselves. My current theory is: if our bodies need sleep, we need to sleep more. It's almost impossible to sleep if our bodies don't need sleep. So, we should acquire more sleep until our bodies don't need more. - Sleep with bedroom's doors open. We want more oxygen. The bedroom with bad ventilation is a CO2 hotspot. - Reduce caffeine intake little by little every day - Make ourselves comfortable e.g. use humidifier if you feel dry in your throat during night time, adjust foot/leg position, maybe add a pillow, so your foot stays at a comfortable orientation, add mattress topper. Comfort is personal... so we need to experiment. (of course, there are exceptions.. sometimes we need to wake up early. But it shouldn't be a norm) Another somewhat big one is to setup my working desk properly. I avoid working directly on the laptop. The screen is too small to sustain long working hour. I tried meditation. Somehow it isn't for me (e.g. I am bothered that I have to meditate and etc.). But the recommendation on meditation is extremely strong, as in everyone in the world suggests it. I might try picking it up again.