Which idiom means to deal decisively with a difficult situation?

• Take the bull by the horns: 
English Meaning: deal decisively with a difficult or dangerous situation.
Bangla Meaning: একটি কঠিন বা বিপজ্জনক পরিস্থিতিতে সাহসী সিদ্ধান্ত নেওয়া। 

Ex. Sentence: She decided to take the bull by the horns and organize things for herself.
Bangla Meaning: সে সিদ্ধান্ত নিলো যে সে এই পরিস্থিতি সামলাবে এবং সবকিছু নিজে নিজে গুছাবে।

Other options, 
Hit the nail on the head - To describe exactly what is causing a situation or problem. 
Let the cat out of the bag - To allow a secret to be known, usually without intending to. 
Break a leg - Used for wishing someone good luck, especially before a performance. 

Source: 
1. Cambridge Dictionary. 
2. lecture.