This is what I picked up, not sure how much of this is considered "best" by experts - The most important thing is attitude leads in the middle of the hand , i.e. if partner wins the trick, should he lead the suit back? This depends on the card you lead. If it is a small card, you're telling partner that he should lead back the suit. If its a high spot card, you;re telling partner don't lead back that suit. Since I just use standard leads, I would lead top of touching honours, and top of an interior sequence. so kJtxx J is lead. If you're going to cash AK, although you would lead A from that holding, to inform partner that you have the ace, I've seen people cash the king, give partner a ruff, so partner can reach them with the ace.