I wanted to share a bit of my experience in terms of using exercise and nutrition to stay positive and productive.
Eating: did you ever notice how certain foods will make you sluggish and kind of drive you more towards the couch and the remote controller as opposed to your computer or notebook + pen? I used to get that awful feeling after a huge pasta or carb-loaded meal, so I'm staying away from that stuff now.
I also decided that the only snacks I'll have around my computer desk are in the form of a carrot, and very rarely an apple or a banana, but not more than one per day. I mentioned that because mindless eating is not all that great for you.
Exercise: I'm currently doing Insanity (I think it's my fourth time doing it), so there's little to no breaks in terms of exercise. But if I'm not doing a program and allow myself more than three days without exercise, my mood tends to decline and I become less productive and motivated to get any work done. So if you experience similar patterns, the answer is simple: allow yourself some time to exercise daily or every other day.
It doesn't have to be the kind of workout that ends up with you having to rest on the floor before finding the strength to get back on your feet (that was me last night ); it just have to be challenging enough to make the today version of you a bit better than yesterday. Come to think about it, so does working on your business, doesn't it?
Have an awesome day,