I always joke with my wife that my favorite yojijukugo are 問題解決 and 安全第一 which are literally just "problem solving" and "safety first" haha.

My favorite actual yojijukugo is 点滴穿石 which water dripping on a stone in the same spot slowly wears it away, which just means if you keep doing what you're doing you will eventually make some noticeable progress in the long run.