Make sure to use your king! When all else is equal, the side with the more active king will get the upper hand. If you're unsure how to evaluate a knight endgame, try to see which king is closer to the center or queenside -- the closer king will be able to contribute to the action first.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown365"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[ECO "A00"]
[FEN "8/8/8/pp3k1p/5p1P/PPP2K2/8/8 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. a4 bxa4 2. bxa4 Ke5 3. c4 Kd4 4. Kxf4 Kxc4 5. Kg5 Kb4 6. Kxh5 Kxa4 7. Kg5 Kb4 8. h5 a4 9. h6 a3 10. h7 a2 11. h8=Q Kb3 12. Qa1 { White wins with a large
material advantage. } 1-0