Spending top dollar for a torque wrench is the best way, but also having the wrench calibrated on a regular basis is also advisable. With the click type make sure that you return it to the zero mark when finished, leaving it set at a high setting can affect the calibration. I use my torque wrenches at work, and the company insist that they calibrate it every 12 months. A wrench used occasionally for my own home workshop use I would probably do every 24 months.
Cruser
