I have a somewhat reverse problem. Some days I struggle to through the day coding, even on routine or easier coding tasks. When this happens find myself daydrea

I have a somewhat reverse problem. Some days I struggle to through the day coding, even on routine or easier coding tasks. When this happens find myself daydreaming or finding other things to do that are not work related. The real problem comes though at about 10-11pm and I get a huge burst of energy and focus to start working. I am left with a choice to stay up later and get work done, or go to bed and wake up earlier to catch up on work I missed. If I do decide to go to bed I will lay there for an hour or so just thinking about work and what I need to get done. With that said, last year I was talking to my doctor about it at my annual physical. He suggested I exercise more often. So for about the last 6-7 months I have made a conscious effort that whenever I feel like I am starting to struggle I will go out for at least a 30 minute walk. I usually end up taking about 4-5 a day. There is definitely a direct correlation between the amount I walk and my productivity. And I am starting to sleep a whole lot better at night. Another thing that has helped me is I stopped drinking soda and now only drink water (or coffee).