In addition to assess the situation and the use of 2 boons on any check allow you to recover stress (if it's a mental check) or fatigue (if it's a physical check) there are quite a few talents that allow a player to recover or protect agains stress and/or fatigue in different ways:
Clear Minded (focus) allow the player to recover 1 stress for 1 boon on when rolling willpower.
Adaptable (focus) decrease the risk of suffering stress when rolling inteligence based rolls with reckless dice.
Resolute (focus) can be exhausted to recover 2 stress.
I'll Sleep When I'm Dead (tactic) can be exhausted to recover 2 fatigue.
Exceptional Training (tactic) can be exhausted to negate 2 banes when rolling a physical check.
Strong Willed (reputation) can be exhausted to recover 1 fatigue and 1 stress.
Confident (reputation) can be exhausted to negate 2 banes when rolling a mental check.
Some of these talents also have "epic" versions which allow for even more stress/fatigue recovery. To aquire these the character has to be at least rank 4 though.
A player who's character often suffer a lot of stress/fatigue should really look into some of these talents. I should think that resolute is a really great way to manage stress levels for a Bright Wizard.