How To Exit Supercruise Correctly

Many people know about holding 7-6 seconds to impact to avoid the loop of shame, but that's not all that you can do to arrive at your destination efficiently.
If you throttle up to 4 seconds as you get within 30mm, then immediately throttle to 0, you'll get within 1mm of the destination right as you get under 1mm/s.
When it comes to destinations that allow more than 10mm/s to drop, you can throttle to 4 seconds as you enter the 1ls range instead of 30mm, and adjust the distance where you go for this "suicide slowdown" according to what speed/distance the destination still allows you to drop safely at.