If you expect the worst, the worst will happen. If you let things bother you, they will. But if you smile, you'll feel better. Studies have shown that putting a cheerful smile on your face can trigger a part of your brain that actually makes you feel happier and more optimistic about the present and future.
如果你總是期待壞的事情發生，那壞事情一定會發生。如果你讓事情來煩擾你，那它們一定會煩擾你。但如果你選擇微笑，你一定會感覺更好。研究表明挂一個大大的微笑在臉上能夠刺激你大腦的一個部分，使你對現在和未來感到更開心和更樂觀。
Also, feed your optimism with positive reminders. Write down short statements that inspire optimism. Put them in places where you'll see them every day, such as on your bathroom mirror, the inside of your locker, and on your computer monitor.
同樣，用積極的提醒也可以提升你的樂觀。寫下一些短小的話語來激勵你自己。把它們放在你每天都會看到的地方，比如衛生間的鏡子上，櫃子裏，或是電腦顯示器上。
"Anything is possible."
"一切皆有可能。"
"Lead a life of positivity."
"積極生活。"
"The only thing I can control is my attitude towards life."
"我唯一能掌控的就是我對生活的態度。"
"I always have a choice."
"我總有選擇的餘地。"
"Even the longest journey begins with a single step."
"千里之行始於足下。"
"I will look at the sunny side of everything and make my optimism shine."
"我會看到每一件事情積極的一面，並讓我的樂觀情緒發光。"（來源：滬江英語）