Dr. Sullivan recommends that as a precautionary measure do not self adjust your own spine or other joints because you run the risk of making the situation worse.  Also nerves exit the spine near the joints and you can also irritate the nerves causing more pain and inflammation.

In terms of self help, strength training in the muscle areas that support the knees, such as your quads and hamstrings, will reduce the stress on the knee joint. Just as importantly, as your muscles strengthen from the exercises and become tight, stretching should be consistent in your workout routine. 

• Exercises such as squatting correctly can work the quads, gluts, and hamstrings. 
  The couch stretch is effective for loosening up tight quads. 

• Exercises such as deadlifts can strengthen the hamstrings. A great hamstring stretch includes standing on one foot, using your hips to bend over to touch the floor and kicking the other leg back straight. 

If you notice that your joints constantly pop or click it probably, even as you strengthen and stretch, it probably means the muscle tendons or ligaments in that area are very tight. To loosen up the tight muscle tendons and ligaments, Active Release Techniques and Graston Technique are effective to loosen up those muscles and ligaments. Once you loosen up the tight muscles, tendons and ligaments the amount of popping and click will resolve.  If the tendons or ligaments become painful and inflamed from the repetitive popping or clicking, laser therapy is a great treatment to heal the tendons or ligaments.