Good luck 祝你好运
"Good Luck to you!"
祝你好运
"Good luck with Sarah!"
祝Sarah好运；一切顺利。

Best of luck 祝你好运
I wish you the best of luck!
祝你好运！
Best of luck with the new job!
（祝你）新工作一切顺利！

I hope everything goes well. 希望（你）一切顺利。
I hope everything goes well for you and your family.
希望你和你的家人一切顺利。

Break a leg 祝你好运
I know you can do it, break a leg!
我知道你能做到的，祝你好运！
Break a leg at your audition.
试镜时祝你好运。

Knock 'em dead 祝成功
You go down there and knock 'em dead!
你会成功的！你会赢的！
You'll be great! Knock 'em dead!
你会很好的！祝你成功！

Fingers crossed 保佑你；（愿上帝）保佑你；祈祷吧
I'll keep my fingers crossed for you.
我会为你祈祷。
I think I got the job, fingers crossed.
我觉得我应该拿到这个工作了，祈祷吧。

Blow them away 将对手彻底打败；打败他们
Your presentation will blow them away!
你的演讲是惊艳全场的！
Don't be nervous. You'll blow them away.
别紧张，你一定会打败他们的。

Knock on Wood 敲敲木头，讨个吉利
You'll get the job, knock on wood
你会得到这份工作的，敲敲木头，讨个吉利。