Most squash games I play are decided by my ability to win points when I'm serving to my opponent's backhand. If I can place the ball so it bounces high off the side wall, then I'm usually able to fight for the point during the subsequent rally. But if I don't, I typically lose the point immediately to a drop shot return or long ball to the opposite corner. Unfortunately, the margin for error between a well placed serve below the line and an unforced error above the line is small.
Like most things, if I don't start out right, it's hard to recover. It's not impossible. I just can't afford to make mistakes later. To improve my chances of winning, I need to focus on practicing my serve placement, so that I'm competing against my opponent and not myself.