Feelings aren't all they're cracked up to be. I can feel good and be happy when all of a sudden something happens or is said and my feelings plummet.
I find it important not to let my feeling dictate how I act or how my day is going.
I can feel rotten or upset or sad or cranky, but I still have to get up, go to work and face several children with a happy face and cheerful attitude. It is not fair to them to see those negative feelings.
You know what? I find that if I lead with the actions I want ( be happy, be cheerful, be calm) then my feelings usually follow.
That is the key to dealing with feelings. At least in my case.