Practices in mindfulness suggest that one way to deal with stress is to notice what is happening when we are NOT stressed: to notice how our thoughts are, what our bodily state is like, what emotions are present.
In taking time to notice and making this practice of noticing a regular habit, several things happen:
1) we notice we are not stressed all the time;
2) we notice that stress comes and goes,
3) we become sensitive to our states and can make adjustments when the stress signals start happening.