Know the ins and outs of how knights fight against passed pawns. Knights can either blockade a passed pawn, or attack it, but not both! If you're trying to promote a pawn, see if you can deflect the enemy knight using your own knight as bait. Knights are also notoriously bad at dealing with passed rook pawns, as they have less room to maneuver.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown66"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "3R4/R2P2pk/8/8/4KP2/4P2p/3r2r1/8 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Rxd7 { Black does not waste any time dashing white's only hope. } ( { Black can try: } 1... h2 2. Raa8 Rxd7 3. Rh8+ Kg6 4. f5+ Kg5 5. Ra6 Re7+ 6. Re6 Rxe6+ 7. fxe6 Kf6 8. Kf3 Ra2 9. Kg3 Kxe6 10. Rxh2 Rxh2 11. Kxh2 Kf5 12. Kg3 Ke4 13. Kg4 Kxe3 14. Kg5 Ke4 15. Kg6 Ke5 16. Kxg7 { Draw. } ) 2. Rdxd7 h2 3. f5 h1=Q { Black wins with a large material advantage. } 0-1