How to Take Measurements

Although I've read some posts describing both scenarios, the descriptions are very vague and could easily be misunderstood by anyone looking to take measurements. I thought it might be helpful if anyone has pics, or could take pics of the actual proper way to take measurements. The most obvious is the amount of lift......hub to fender. Is this done with the wheel on or off and where on the fender. Also suspension travel. What's the easiest way to flex the suspension with the shocks removed and do you just measure from shock mount to shock mount?