I thought of last week's tip during a game with right- and left-handed opponents. They hadn't decided who would take the center shots. My partner and I won several points by placing shots down the middle until they started calling "mine" and "yours."
Oftentimes, players don't realize their own weaknesses, and it may take a while for you to spot them, too. But once you discover an edge, keep after it. When they counter it, move on to something different.
Speaking of weaknesses, it pays to examine your own shortcomings for two reasons. First, once you know what's causing trouble, you'll be able to work on it. Second, you can share this knowledge with your partner, and she can help cover. For example, if your backhand isn't strong, you and your partner could switch courts so your backhand is always toward the center.
Now, let's talk about strengths. If you have a great lob, or a great drop shot, or perhaps you dink like a madman -- keep doing it! Set up your shots so you'll end up being able to dink and you then have an advantage where perhaps your opponents do not. When you can pair your strength against your opponent's weakness, you have a strong combination that's hard to beat.