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 "Ekajo"]
[Date "????.??.??"]
[Round "?"]
[White "Ivarsson"]
[Black "Ljungquist"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "2kr4/pq5p/1p4r1/2P2pb1/8/7Q/PPR2PPP/4R1K1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Qe4 2. Qc3 ( { White dare not try: } 2. Rce2 Qxe2 3. Rxe2 Rd1+ 4. Re1 Rxe1# ) ( { White dare not try: } 2. Rec1 Qxc2 3. Rxc2 Rd1# ) 2... Bd2 3. Rxe4 Bxc3 4. g3 Rd1+ 5. Kg2 fxe4 6. cxb6 axb6 7. Rxc3+ Kb7 { Black wins with a large
material advantage. } 0-1