First, be sensitive to WHEN your partner is ready to dissect the match. Some players get really emotionally involved in winning or losing, and just can’t talk about it right afterwards. So give them time to cool down and talk when they are ready.
But when the time is right, you should go over all the things you planned to do – and how well/poorly they worked against this team. Was the strategy bad or did you just not execute it well? If you played them again, what could you do differently to change the outcome?
It is also OK to review the “team basics” every so often … which side you return serve from, who serves first, etc.
And when the time is right, a good and open doubles team will also be able to discuss stroke strengths and weaknesses. If you partner is struggling on return of serve, not only can you practice it with him, but perhaps you see something that can help improve that stroke.
If he has a weak second serve, encourage him to practice it and give him the support of telling him you OK with his “going for more,” even if it means some double faults. A good doubles team is a good personal relationship, where you like being with your partner and can talk about all topics to make your game better, more successful, and more enjoyable.