Hey there,
I always recommend candidates to practice case skills in between sessions. You can do this either by
- practicing with a case partner
- practicing by yourself
For the latter, you can use any case you find on the internet (ideally real cases from companies) or even create them yourself with newspaper articles. The important thing is that you use the cases as drills and go question by question until you reach a recommendation. For candidate-led interviews, this is not ideal since you miss the important part of drilling down to find the problem. For interviewer-led McKinsey-style interviews, this can be done almost like practicing with a case partner since each question stands for itself.
However, this is much more effective once you have a true and tested way of how to solve
- structure and brainstorming questions
- chart interpretation questions
- math questions
for each of which I'd recommend going over with a coach. Once you learned the habits to deal with each, you can set off on your own and spend a weekend going over drills. Then treat it like a real case interview and apply the habits (e.g. take time to think, structure it, communicate out loud, etc.).
Cheers,
Florian