As an older tennis player, the introduction of the "chip" can greatly change up your game in a very positive way. However, don't forget the classic strokes (topspin groundstrokes, volleys, overheads and lobs).
 
In this article a "chip" will mean the use of underspin, high to low. A player can "chip" back a groundstroke, can "chip" to execute a drop shot, can "chip" an approach shot, can "chip" back a ball as a lob and can "chip" or block back a hard serve or overhead. A "chip" is hit more like a volley, but after the bounce.
 
I would say, "Variety is the spice of life." If you can take your normal classic game and gradually start introducing these "chips" into your game you will become less predictable and more progressive.
 
Remember, a "chip" is more like a volley, short punching motion, than a groundstroke. So, don't think you can't hit one. All the volleys you have been hitting forever are very similar to a "chip." I believe the greatest asset of a "chip" is blocking a hard shot back and hitting a ball short forcing your opponents into the net where they might not feel comfortable.
 
So, don't panic. You must remember that you have always hit volleys. The "chip" is more like a volley. Gradually introduce some "chips" into the mix. It will keep your opponents off balance.
 
Have a good time on the courts!