Have your trainer with you every step of the way. However much you think you know, there will always be someone out there who knows something more than you. Talk to as many people as possible. There will always be people who will want to talk.
Just a side note, there was a man who came to my work often. He and his wife raised and trained Racers as a hobby of all things. He was telling me about a filly that they never had time for. She didn't get started until she was 4 and he said that she had the best runs out of any of his horses.