Make sure that you immerse yourself in ALL the materials posted in these channels. Read everything from the beginning to the end. I personally have benefited a LOT following these channels. And most of them have, sort of, played a role in my achieving this 8very band score.
Disclaimer: These channels are perfect for those scoring 5.5-6.5 and desperate to get 8.0 or something. This may sound too good to be true, but believe me: if you're hardworking enough, there's no stopping you!