1 Permanent suppression of his opponent's aggression. This does not mean you have to kepit all 4 streets. But you should not be afraid to put, even if you do not have any matches on the flop, and constantly attack the blind pre-flop raise.
2 Forcing the enemy all the time to change your game, so - to play in an unusual manner themselves. This will lead to errors on tilt. At the same time need to be balanced: the enemy can not be made to understand that you are exploiting some of its space in the game. After all, he can fix it.
3 Care. You can use the holes in the opponent's play, just watching him play directly. No other choice.
4 Art
bluff. In HA you will constantly face a situation when the flop you have absolutely no help. But this does not mean that you have to throw the hand. Or check three-bet or check-raise, or trapping, if you think you have better hand - these techniques should be used continuously.
5 Bids for value, which means a mandatory "transoms" with the opponent's river bet - if there is a chance that your combination is stronger.
6 Iron tiltoustoychivost. In HA is a high probability of tilt, so here than anywhere else, it is important to remain calm and clarity of mind. Besides the heads-up - the variance of all forms of poker.