What's you recommendation to get interview ready again the fastest?

I'm not sure how to ask this question but I'll try my best

Recently lost my big tech DS job, and while working I was practicing and getting good at the one thing I was doing day to day at my job. What I mean is that they say they are interviewing to assess your general cognitive ability, but you don't actually develop your cognitive abilities on the job or really use your brain that much when trying to drive the revenue chart up and to the right. But DS/tech interviews are kind of this semi-IQ test trying to gauge what is the raw material you're brining to the team. I guess at the leadership and management levels it is different.

So working in DS requires a different skillset and mentality than interviewing and getting these roles.

What are your recommendations/advice for getting interview ready the quickest? Is it grinding leetcode/logic puzzels or do you have some secret sauce to share?

Thanks for reading