So far I've heard several answers to such a question:
1) read business articles
2) practice more cases
3) read business literature
Tried all 3 options, but somehow I'm still stagnating (constantly recieving same feedback while improving in other areas). The only thing that works for me so far is real experience, but it's definetely not the most time/energy-efficient way to develop business judgement for case interviews.
Please elaborate as thorough as possilbe! Especially if you were able to solve such a problem for yourself.
Any specific business books will also be highly appreciated (since most "best-sellers" are.. let's say not really suited for case prep).
Thanks in advance!