While impressive on your part, this article is underwhelming and misleading. Besides preparing for interviewing by gaining confidence, doing lestcode, and mock interviews (which everyone says already), you did not provide really any nuanced anecdote experience that one can take away from this — at least I didn’t find anything new.

I think the hardest part of any application is getting back resume screening. What follows is what, more or less, we can control (as you mentioned).