Originally Posted by daleks

You can use torque sticks or estimate the torque by a graph that's usually available in a manual. It shows time vs. applied torque. So you can just tap it for a second or so. It's far from accurate however.

Ideally though you'd use an impact wrench for removal and a torque wrench for tightening. With a torque wrench you can set it to the desired ft/lbs and just rotate until it clicks.

That said, most people just zap it with the impact wrench and call it a day.