Smile, my dear. Here is a short story.

There I was, sitting at the bar, staring at my drink, when a really big, trouble-making biker steps up next to me, grabs my drink, and gulps it down in one swig. 
«Well, whatcha gonna do about it? » he says menacingly, as I burst into tears.
«Come on, man,» the biker says, «I didn't think you'd cry. I can’t stand to see a man crying. „
“This is the worst day of my life,» I said. «I'm a complete failure. I was late to a meeting and my boss fired me. When I went to the parking lot, I found my car had been stolen and I don't have any insurance. I left my wallet in the cab I took home. I found my wife in bed with the gardener, and then my dog bit me, so I came to this bar to work up the courage to put an end to it all. I buy a drink, drop the capsule in it, and was sitting here watching the poison dissolve when you show up and drink the whole thing!!! But enough about me, how's your day going? „

Why bad days are good for us
Bad days are good for us: Being in a bad mood can help you think clearly
Sometimes you just wake up in a bad mood. Everything annoys (раздражает) you. Your shirt’s too scratchy (колючий), your coffee is too sweet and the guy in front of you has his headphones on so loudly it is making you want to rip (вырвать) his iPod from his ears and throw it out of the bus window. Although no-one will like this irritable (раздражительный) and cranky (с причудами, капризный) version of you, Australian researchers have found that being grumpy (сердитый, угрюмый) helps us to think clearly. Oddly, being grouchy also helps us to make decisions quickly and we aren’t so easy to fool. So, if you wake up in a foul (отвратительный) mood one morning and are feeling bad tempered (не в духе), it might be the perfect time to take on that difficult task at work. 
why your car breaking down and bad days are good for you
Bad days are good for us: Your car breaking down can cut the risk of heart disease
One of the worst ways to begin a day is to be late for work. Your alarm doesn’t go off (не выключается) and your car won’t start (не заводится). Although it may feel like you are on the verge (край) of disaster remember that your car breaking down can help you get healthy. Ditch (бросить) your car and jump onto your bike. You’ll whizz (проноситься со свистом) through the traffic jams (пробки) that stress you out, plus if you continue to ride your bike to work it can drastically (радикально, решительно) cut the risk of heart disease. If you swap (поменять) your car for cycling (катание на велосипеде) or walking you are also less likely to be obese (страдать ожирением) and you have an 11 per cent reduction in cardiovascular risk. So, the next time your car breaks down, remember that this might be the first step towards a healthier, happier you. 
Bad days are good for us: Not getting a promotion is good for your mental health
Missing out on a promotion at work can be humiliating, painful and hard to recover (восстановиться) from. If you didn’t get the job though, just remember that a promotion can have terrible effects on your health. A study by Warwick University found that people who had recently been promoted had no health improvements, rather their mental health decreased by a whopping (разг. огромный) 10 per cent. The study also found that due to increased responsibilities those workers who had a promotion visited their doctors 20 per cent less than those workers who had not been promoted. Maybe that new job wasn’t so great after all? 
Bad days are good for us: Being dumped (брошенный) can help you lose weight
The end of a relationship can mean the end of your diet. Out comes the bowl (миска) of ice-cream, the wine and the comfy (удобная) pyjamas. The Sinead O’Connor CD is cranked up (раскручивается) and played on repeat until you know ‘Nothing Compares To You’ off by heart. But, once you’re passed all of the heartache and tears, a breakup can help you lose weight. Relationships can be full of fat-traps and a US study found that 46 per cent of the married women in the study gained (набрали, заработали) 20 pounds after marrying, whilst singletons (в то время как одиночки)  do more exercise. 
Bad days are good for us: A tough day can stop us from getting colds.
Stress is most people’s worst enemy. It can be awful when you have to visit the dreaded (ужасающий) dentist, your boss gives you an impossible task, or you have a dreaded visit from the in-laws. Although it’s true that stress is, on the whole, a bad thing for us and our health, it turns out that a little bit of pressure can actually be good for us. A small amount of stress can help boost (увеличить) your immune system. This is because when you start to feel the pressure your body produces cortisol, which in small amounts can have lots of benefits to your body. Therefore if you’re having a tough day and are feeling the pressure, remember that your immune system is getting a boost, which could help you fight against colds and illnesses.

Have a great day!