How can you improve problem-solving skills for coding interviews?

I'm preparing for software developer interviews and want to improve my problem-solving skills for coding rounds. I know that solving data structures and algorithms (DSA) problems is important, but I'm unsure how to practice effectively and think through problems during an interview.

Can someone explain the best strategies for improving coding problem-solving skills, including how to approach new problems, choose the right data structures and algorithms, optimize solutions, and practice consistently? I'd also appreciate recommendations for beginner-friendly platforms and common mistakes to avoid during technical interviews.