The answer to this one is going to sound counter-intuitive, and it is....just like most of the advice in DBing. But the answer to this one is DO NOT LOSE YOUR SENSE OF HUMOR. Back in the 80s a group of psychologist did and experiment. They took people that were sad and depressed, and had them force themselves to smile. Guess what, what they found is that when you do that you move muscles in your face that you only use when you are happy, and it triggered endorphins to be released in the brain and people felt happier. You see Sense of humor, and you think "I am too said to be humorous". In reality it is exactly because you are sad that you should be humorous!!!
I'd love to see the cite for this.
I realize this came of snarky. I didn't mean it as such. I was just curious if you had more information.
I've read this from several sources. I used to throw my arms up in the air and yell "YES" for like 2 or 3 min before I walked in the house if I knew my W would be there. It worked for me.
It gets your mind in a good spot and your attitude shows.
This also works with calming yourself before going home if you are anxious.
Stop. Take 4 slow deep breaths. Re-center yourself. It has something to do with the increased oxygen to your brain. Same idea with the endorphins from laughing.
One other thing that's helped me - Vitamin supplement 5HTP. Some people don't think supplements do anything. I find it does for me. Even if it's just psychological, I really don't care - I feel better when I'm taking it.