각오해둬. Brace yourself.

[Katharine]

to brace oneself for 

you brace yourself for something unpleasant or difficult, you prepare yourself for it.
     He braced himself for the icy plunge into the black water.
     She braced herself, as if to meet a blow.

to steel oneself for

If you steel yourself, you prepare to deal with something unpleasant.
     Those involved are steeling themselves for the coming battle.
     I was steeling myself to call round when Simon arrived.

[angela]

저는 오늘 공부 하다가, steel yourself=breath yourself 인줄 알았어요. 그런에 오늘 이곳에 들어와보니, brace 네요. 저는, 숨을 들이 쉬면서, 마음을 다지는것으로 생각했거든요. 점점 재미있어 지는데, 몇주 불참 하게 되어 섭해요. 재미있고, 신나는 중독 같아요. 헤어지기전에, 우리가 나누었던 이야기들의 결말이 어떻게 났는지--, 다음 기회에--^^thanks a lot.