Instruction - Overhead SmashGrips: The Eastern forehand grip or the continental grip are recommended for the overhead. If you're a former tennis player, use whatever grip you used for serve and overhead in tennis.
Never........never........never..... back up while facing the net in an attempt to hit an overhead. You are to likely to lose your balance leaning back and fall and hit your head. This is especially true for us seniors that are less agile on our feet than we used to be!
Other Tips on hitting the overhead
Don't aim too close to the lines and make a lot of errors. Have patience and wait for a short lob before taking a chance.
If you often hit your overheads long, it is usually because you are not hitting the ball far enough ahead of you.
If you often hit your overheads short, it is usually because you are hitting the balls to far in front of you.
Use the middle. In Pickleball, it is often difficult to hit the ball away from two good defensive players. If your opponent hits a lob that makes you hit a smash from 3/4 court or farther, don’t try to do too much with your reply. Hitting a solid overhead down the middle can be a smart and effective way to keep your opponents on the defensive. The opposing team might be confused as to who should handle the overhead, and it draws them into the center of the court, creating more angles for your next shot. They will usually hit another lob, and if you get to hit it around the no-volley line, you are more likely to hit a winner from there.