Scott: since scott is stressed about the supernatural and life in general you usually just lay in his bed and talk.
Stiles: when stiles is stressed you play a bunch of movies and eat food.
Derek: when derek gets stressed which isn't that often but when he does you usually make out to get his mind of it.
Isaac: when isaac is stressed you usually will have a nice bath tub for you both and talking about whats stressing him out which leads to other things.
Liam: when liam is stressed you guys would go on a run and talk.
Nolan: like Scott, when nolan is stressed you would cuddle and talk.
Theo: since theo doesn't get really stressed since he's well theo, but when he does you would make a nice dinner and relax.