When diagnosed, I was told by my doctor to keep my blood sugars as close as possible to normal values, to hopefully minimize complications.
The "normal" levels given to me to strive for are:
Fasting: 110 or less
2 hrs after first bite of meal: 140 or less
Random: 110 or less
In testing my non-diabetic husband (when he'll let me

), his fasting is usually in the upper 70's or low 80's, and his 2 hr post meals are usually quite close to this as well. I've checked one hr post meal and he's been 120-140, but at the
2 hr reading, he's usually back to near fasting level.