Question 10 common defence

This position has come up to me very often and so far i have only come up with 1 good move to stop it and it doesn't help any other part of my board much. I was wondering what the best way was to defend against this. It threatens either check wuth the bishop or rook and queen fork with plenty of other troubles. So far my main defence is h6 simply stopping the knight. It works well enough but hurts my side of the board positionally as it sets me behind in tempo.

Is there a better move?