Parents with bilingual children, how did you do it?

Although I mention parents specifically in the title, this isn’t just for parents to respond.

My wife and I are trying to raise our child to be bilingual (English and Portuguese). Currently we’re both speaking a bit of both to our child and when they eventually go to school we’ll speak more Portuguese as they’ll be exposed to English everywhere else.

Is this a good approach or is there something we can do better?