Even the happiest among us are not impervious to sorrow. All of us go through times when there will be sadness due to some reason or the other. It may be due to some failure, loneliness, homesickness, or something similar. However, you need to get out of it somehow. Sadness is best defeated before it really gets to us.
Good Mood Elevators
In my opinion, physical activity always numbs mental pain. It gives your brain something else to think about rather than what was troubling you. And, if you run faster than you did yesterday, or manage to pick up more weight than usual, it will give you a sense of achievement, and thus will elevate your mood.
But unfortunately, foods that enhance your mood, are rich in fat, hence, it is better that you be a little cautious with them. Moreover, you can go for foods with a higher monounsaturated fat content.
Perhaps it is the sense of being in control, or the speed and thrill, or simply the sight of the open spaces that makes us feel better. Going for a drive is what most people often do when they have to face the bad mood syndrome.
These days, joke books are quite comprehensive, and have all kinds of jokes from the crass to the intellectual. So, if ever in a bad mood, go buy one of those 1000 jokes type of books.
Your brain and mind gets hamstrung by sadness, and clear thought and activity becomes labored. So, the first thing you need to do is to change the mindset. Get out of the sadness and decide, that you want to boost your mood. Once you do that, the hard part is over. Then ideas will come to you.