My pup is now 16 weeks and we have a 13-year old Golden, so I can relate.
One thing I wish I'd done is the umbilical method, or some variation: keep him close so that he never gets a chance to go into the corner and potty. Would have saved some time and cleanup, I think.
My Jupiter wants to be with me at all times (unless he's being naughty and trying to rip up one of my daughter's toys), and will scream and yelp if I don't allow him to do so. It seems to be a feature of the breed that he wants to be with his person at all times.