Some things I've found useful are
- play team games: but they are more time consuming and less useful to improve your 1v1 skill
- play music: I was hesitant to reduce my game volume and replace some of the cues it provides with an online radio station, but I actually find it easier to focus on the big picture and remain indifferent enough to make clearheaded decisions in game situations that would otherwise have me scrambling to resolve them. I tried this after seeing Zock do it.
- play zoomed out a lot: on top of other advantages, this reduces the persistent humming of battles and factories
It has occurred to me that the sound effects in FA are quite tiring: it may be too much work for what it's worth, but a mod that would reduce persistent or drawn out sounds with others that are clear, distinctive and pleasing to the ear might be an interesting proposal.
So how do you combat the build-up of distracting stress: do you have pre-game rituals, drink herbal tea or do you actually find stress helpful?
Cheers,
Bart