You'd better get used to that idea.
你最好习惯这样.
get used to sth:习惯于某事 to become familiar with sth and no longer feel it is unusual
I'm not used to eating so much at lunchtime.
我不习惯午饭吃那么多.
I found the job tiring at first but I soon got used to it.
起初我觉得这份工作很累人,但很快就习惯了.