What's your top tip for new dads?

Put your wife in top priority. You take care of her well and she takes care of baby in the healthiest state of mind. Block out any negative comments for her by reassuring her she is doing a great job and be on her side no matter what others say, voice out your stand in front of others if they try to impose their ideas on you. Trust that she is the baby's mother and she knows what's best. Offer advice only when asked.