You also posted a blog.
Supercharge my chess in 21 days

Ah!! I saw it before. Still not sure whether it was worth buying So I bought a premium membership instead. Hope that I can improve my game.

It's not worth buying. Too cheap for words. I suggest anybody to learn through
Gm Igor Smirnov's RCA courses. And should join Kasparov's training too.
I fully agree with the first statement. I had a look at a free copy of the course and, although it does include useful tips, it is not worth spending money on. If you browse through the forum on chess.com you will find the same recipe: spend time on tactics (50%), endgame (30%) and opening (20%; with use of annotated master games).
I plan to start to test a training program and write about my experiences every day.
You can read the details about the training program here.
Supercharge your chess in 21 days!