Arrogance gives you the feeling of superiority and thus removes self doubt. If your trades suffer from self doubt then get a little more arrogant about your trades. Stick to your plan though. Too much arrogance will ruin you.
Exercise will definitely help with the stress. You may not believe it now but try it. And not just once. You won't like the first day. Or the first week. By the time you get exercise into your daily routine you'll feel better both physically and emotionally.
Actors and actresses are good at 2 things:
1 - Pretending to be something they're not while on camera
2 - Being sexy
Their political opinions should reflect this.