If you are a casual golfer, I'm not one to say going out, getting a new set of clubs and getting fitted is the way to go, but, if your clubs were made 30 years ago, your first step would be to go find a set you like and get fitted. The reason I usually say this is for a "casual" golfer, it's not worth the money to keep renewing everything to shave a couple of strokes here and there. If you've never been fitted and your clubs are 30 years old though, you will find things have really improved and it will make a big difference.
Other than that, there isn't a whole lot you can do. Only playing 10 times a year or so is not going to allow you to really get enough time actually playing to really work on the other parts of you game that make a difference. If you really want to shave off strokes and have the time, go get a bunch of balls and find a place you can practice hitting from a 100 yards and in at the green. Most costly mistakes for the casual golfer are made on your short game shots. Missing chips, putts, etc.
So once you get the new clubs, get to the range and practice.