yup..aggression is the key, I tend to raise no matter what I have pre-flop, if i get re-raised with a poo hand then simply fold, if i get re-raised with a solid hand (AA,KK,QQ,AK,AQ etc) I tend to push, if i get re-raised with a mediocre hand then call and play the flop...but all out aggression always works for me .