I wish I could say I know an opening...
On a serious note: tactics, studying and practicing typical endgame positions, playing and analyzing lots of games in certain pawn structures that occur in "your" openings to get a feeling of how they should be treated. Sports, good nutrition, belief in your powers, love for chess and desire to improve!
I'm getting kind of misty...

I wish I could say I know an opening...
On a serious note: tactics, studying and practicing typical endgame positions, playing and analyzing lots of games in certain pawn structures that occur in "your" openings to get a feeling of how they should be treated. Sports, good nutrition, belief in your powers, love for chess and desire to improve!