When I first started playing Friday Nights at the chess club, there were two areas (outside of tactics and board vision) where I felt stronger players were significantly stronger than me : The strength of their rook moves and their endgame skills.
In reading Comprehensive Chess Course V2, it pointed to a game which amazed me. I consider it to be
The Immortal Deflection Game
I think there is a lesson for me to look closer for backrank weakness!