One of the key things that I have found is to understand that you will never please everyone. There will always be a student who isn't happy - so figure out if that is really related to you- if it isn't then it shouldn't be a source of stress- you will never please everyone 100% of the time. It is ok to recognize that people will disagree with you, be upset about something and that you can not control the opinions or actions of others. Realizing this can greatly reduce your stress bubble. Accept responsibility for things that you can own, but if you have no control over it- it's generally not a good idea to stress about it.