Build your board vision. If you can't see deep, you can't calculate deep

Build the ability for instant recognition of tactical patterns

Build your intuition for when the position is tactical

Build the habit of Blunder Check before making a move

Build the habit of considering candidates first

Build a structured way of thinking in attack and defense

Learn the art of ignoring threats with rapid development and active defense in the opening

Build the intuition for endgame blunders

Play on lichess here & analyze your games even if you don't want to