Good knowledge of must-know endgame positions is a great help. That’s why I wholeheartedly recommend to you the course “Killer Endgames” made by GM Nick Pert. It covers all the fundamental endgame positions you MUST know.
Get it now here: http://chess-teacher.com/shop/gm-nick-pert/killer-endgames-with-gm-nick-pert/