Idiom-(come to grips with/measure twice, cut once)
1. come to grips with
-accept the reality of the situation
Eg. In order to succeed at an exam, you must come to grips with your ability first.
2. measure twice, cut once
-make sure before you do; think about carefully
Eg. Henry often makes errors that are expensive to fix. He should measure twice, cut once before he acts.