We've all a bad day here and there, where everything just seems to go down the drain. Bad moods happen for a reason, and it's often due to "ego depletion"—the idea that you've used up too much willpower to avoid something. The other thing that can make it worse? Thinking about the fact that you're having a bad day. In fact, believing in the concept of a "bad day" is likely to make your day worse. If you're having a short bout of stress, though, luckily there's a lot you can do to crush it right then and there.
Eat: Theoretically, doing anything you like can improve your mood, but food works in a number of ways. First, it regenerates nutrients you've lost over the course of the day. If you're in a bad mood because you haven't eaten and your blood sugar level is low, you should already feel better after a few bites. As it turns out, there's also a chance fatty acids can have a positive effect on emotion. If fatty foods aren't your thing, eating spicy foods are known to release endorphins, the same boost you get from exercising. Basically, eating can often reverse a bad mood, but be careful not to overdo it.
Exercise: Exercise increases endorphins and can naturally switch a mood from bad to good in a matter of a few minutes. You can get an endorphin boost from exercise by exerting a moderate or high level of exercise. When your breathing starts to get a bit difficult, the body releases endorphins which can be associated with feelings of happiness. The euphoria isn't long lasting, but it should be enough to make you forget about the guy who cut you off in traffic.
Listen to Music: Music can trigger a release of dopamine into your brain. This is associated with a pleasurable feeling and subsequently can turn a frown upside down in the span of a three-minute pop song. Basically, as you're following a tune, you are anticipating what's going to happen next and the reward for doing so is a little shot of pleasure.
Embrace It: A bad mood can trigger more attentive, careful thinking and allows you to zero in on specific tasks. As we mentioned above, it gives you a sort of tunnel vision, which also means your focus is dedicated to one project. Since you can pay more attention to specific details it's a good time to get started on complex projects, rework old hair-brained ideas, or tackle a task that requires your total attention. It can even give you a slight competitive advantage because your focus is driven directly toward a task. It can also make you more persuasive because it promotes concrete ideas and communications styles. It might not be the most pleasurable way to deal with a case of the Mondays, but at least you'll get a bunch of work done because of it.
(By Whitson Gordon via Lifehacker)