This is GREAT advice. For soo long I couldn't hit a nice first serve. I had been using a continental grip and all my serves landed in the middle of the box, soft and spinny. Think Errani's second serve. Then one day, I decided to move my grip to between continental and eastern and from the very first serve it felt absolutely right. It is SO much more natural for me. Now I use the continental if I ever need any more spin, the added confidence let me really rip into the ball and get a decent kick serve. Play around *a little* for sure.3. Make sure you have a good grip. Continental is the way to go but takes time to adjust to. Still, there is a clear difference between any continental grip and one where that allows you to get a very natural wrist snap. Just mess around with your racquet a bit to find what feels right. And make sure it doesn't strain your wrist, because that is an easy problem to have as well.
In terms of mechanics it's hard to say, but try to find what feels natural for you.
Maybe try what I did? Instead of changing grip by going down half a bezel, go up half a bezel?Does anyone have advice on second serves though??? My first serve is very good and my second is decent when it works, but I go through patches where I just get the yips and can't get a second serve in the court. Even when it works, it's sort of just a softer version of my first serve that I try to get deep in the box rather than a shot I can actually depend on .[