I've gotten to the point where, at most, I need to make a second trip back to the grinder to match the chips.
I ground a few drills down to the nubbins to learn though!
The biggest trick is don't let the drill get too dull in the first place. They get harder to sharpen once they're all F'd up. Then, all you should have to do is touch-up work. Before removing the drill, mark which flute (if any) is taking the heavier cut. Lean on it a bit more when you touch it up and follow the existing point angle. Inspect with the drill gage.
