SSSShhhh. Listen very carefully. Did you hear that. No, not Robin Williams. No, if you listen carefully, you'll hear Sun Tzu, from the 6th century BC? Sun Tzu, the military strategist and author of The Art of War, wrote: Strategy without tactics is the slowest route to victory. Tactics without strategy is the noise before defeat.
I am quite confident that he was addressing diabetics when he said this. Why? What he was saying to diabetics was this: You must know what your overall strategic goal is (i.e. achieve an A1C of <7%), or you will have no idea if all of the tactics you are employing (diet/exercise/medications) are effective and/or need to be modified.
This applies to any chronic disease: first step, driver, is to know your strategic goals.