As part of my “multi-pronged attack” on exam prep, I viewed the following videos from Tutorials DOJO. It’s completely free BTW, and I’m not getting any referrals or anything. I just wanted something “from the horses mouth” as it were.

Tutorials DOJO released free guidance video from AWS on what to expect in the exam, which informed my study plan.

A combination of this, my own mind-map of the exam guide and social media discussion of the exam helped me form my own study plan.