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 "Unknown155"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "3r4/6k1/1p3p2/3n1qp1/1P1P4/P5P1/1B3PK1/2RQ4 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Rh8 2. Qe2 ( { White can try: } 2. Qb3 g4 3. Re1 Rh2+ 4. Kxh2 Qxf2+ 5. Kh1 Qxe1+ 6. Kh2 Qe2+ 7. Kg1 Ne3 8. Qxe3 Qxe3+ { Black wins with a large
material advantage. } ) ( { White can also try: } 2. Qf3 Rh2+ 3. Kxh2 Qxf3 { Black
wins with a large material advantage. } ) 2... Nf4+ 3. gxf4 Qh3+ 4. Kg1 Qh1# 0-1