Control your moods.
Try this: get furious while you are absorbed in a happy feeling.
It is impossible for us to have two different emotions at the same time. Our brain is not good at emotional — and any kind of — multi-tasking. It is the matter of what we focus on.
One of my morning rituals is to listen to the song “Happy” by Pharrell Williams while I do a stretching. I usually do this right after I finish running, when beta-endorphin is flowing around my brain. It is quite difficult, if not impossible, to be anxious or pessimistic during that time.
We can’t keep negative feelings from popping up in our mind. It’s a normal function of our brain. But it is up to us to choose which emotions we focus on.