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 "Unknown402"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "8/7p/6p1/1k2p1B1/4PbP1/3K3P/8/8 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Bxf4 exf4 2. g5 ( { White can try: } 2. e5 g5 3. Ke4 Kc5 4. Kf5 f3 5. e6 f2 6. e7 f1=Q+ { Black wins with a large material advantage. } ) 2... Kc5 3. Ke2 Kd4 4. Kf3 Ke5 5. h4 Ke6 6. Kxf4 Ke7 7. Ke5 Kf7 8. Kd6 Ke8 9. Ke6 Kf8 10. Kd7 Kf7 11. e5 Kf8 12. e6 Kg7 13. e7 h6 14. e8=Q hxg5 15. hxg5 { White wins with a
large material advantage. } 1-0