I recommend
* A Function for Thought Experiments (1964): What do scientists discover by using thought experiments?
* The Essential Tension: Tradition and Innovation in Scientific Research (1959): a great summary of The Structure of Scientific Revolutions (1962). After reading this, there's little need to read the actual book!
* The Historical Structure of Scientific Discovery (1962). It's basically a summary of The Structure of Scientific Revolutions (1962), especially chapter 6, "Anomaly and the Emergence of Scientific Discoveries"
* Mathematical versus Experimental Traditions in the Development of Physical Science (1976): Kuhn proposed two kinds of science: "classical/mathematical" (astronomy, statics, music theory) and "experimental/Baconian" (electricity, magnetism, heat, chemistry, biology). This is a very perceptive classification and explains quite a lot.
* Concepts of Cause in the Development of Physics (1971)
The rest are wordy papers against the critics. Don't bother.