Reddit mentions of Case Interview Secrets: A Former McKinsey Interviewer Reveals How to Get Multiple Job Offers in Consulting

Here's a Bain video with rehearsed interviews that I think does a really good job of showing how a perfect interview goes: https://www.youtube.com/watch?v=qbP8QKlXjKg

This is a BCG case they have online that shows a "transcript" of a pretend interview (they also have more practice cases on their site) that also shows how an excellent interview candidate performs:

https://www.bcg.com/en-us/careers/path/consulting/driving-revenue-growth.aspx

I would read, at a minimum Part 3 and Part 4 of this book:

https://www.amazon.com/Case-Interview-Secrets-Interviewer-Consulting/dp/0984183523/ref=sr_1_3?ie=UTF8&qid=1535150447&sr=8-3&keywords=case+interview

Here's a preplounge math tool to get better at math:

https://www.preplounge.com/en/mental-math.php

For business background, start reading Bloomberg Businessweek. A lot of their articles are very case-like scenarios.

You could also read through cases (without a practice partner) and absorb the kinds of problems/solutions being implemented to get more business sense.

Gotcha.

Another good resource to start thinking like a consultant is here: https://www.amazon.com/Case-Interview-Secrets-Interviewer-Consulting/dp/0984183523

Victor has a lot of stuff for free online.