An electrician is only as good as the conditions of his tools, and the same can be said of a golfer. Unless his clubs are in tip-top shape, he will never live up to his potential. At the end of each season, a golfer should completely overhaul his clubs. If you do this, you will not only shoot lower scores, you will grow to love the game even more.
Remove the clubheads from the shafts. This is quite easy to do because they are attached to their connection, or hosel, with an epoxy glue you can easily liquefy with a blowtorch or heat gun. There may be a plastic ferrule at the bottom of the shaft that you should set aside. If your clubheads are made of steel or titanium, first buff out any nicks and scratches with a belt sander. Sand the faces of each club; and using a handheld auger, clean and deepen the grooves on each clubhead. Then use epoxy glue on the tips of the shafts and the hosel, first making sure the remains of the original glue are gone. Finally, reinsert the shaft all the way into the hosel. Allow about 24 hours for the epoxy to dry.
When the clubheads are removed, inspect the shafts carefully for any rust or bending. If any are compromised, replace them. Be sure the replacement is of the same material and has the same flex as the one you are replacing. Or you could replace the old shafts with different ones based on changes you'd like to make to your game.
Generally, golfers think their grips will last forever, but there is nothing on a golf club that deteriorates faster, either as a result of too many rounds or excessive sweating. In addition, advancements are being made in grips that will benefit any golfer, so you should change your grips at least once each year. Grips and the tape underneath can be taken off quite easily with a sharp knife. Put on new double-sided tape, soak the tape and the inside of the grips with a solvent, and slide the new grips onto the shafts. After you make final adjustments, you will essentially have new clubs.