Jenny Ruhl, a well-known author of business books, was diagnosed with diabetes in 1998. Nothing doctors told her about how to control her blood sugar corresponded to her own experiences and observations. To answer the questions "What causes diabetes" and "What blood sugars prevent complications" she dug into the medical journals newly available online and spent a year tracking down the facts. The result was the bloodsugar101.com web site which now gets well over a million visitors a year.
She is a strong supporter of the The "Test, Test, Test" strategy for lowering blood sugar. It embodies the highly effective strategy she learned on the now-defunct alt.support.diabetes newsgroup back in the days when it was frequented by quite a few bright, inquisitive engineers. She hears from hundreds of people each year who have used that technique to bring their A1cs down into the 5% range that research shows will prevent diabetic complications.