Do you play a little draw or fade. If so, inconsistency can be frustrating. And no, its not always your fault. The equation to better golf is 50% equipment and 50% instruction. In many instances, properly built and custom fit irons can translate your subtle misses into straight shots.
Before you go out and purchase that next set of clubs, educate yourself on current golf equipment technologies and you will be scoring better without having to take lessons or even practice.