Ok, I've done some reading and have some experience so I'll share my expert "only way it can possibly be done right" method.
Make sure your equipment is well maintained. This includes proper lubrication and sharp blades along with gearbox with proper type and amount of oil. If you have an open station tractor (don't have one of those fancy smancy cabs), then select a time of day when the weather is favorable to your mowing pleasure. Please make sure to take into consideration wind, temp, rain, humidity, etc. It is best to mow in a forward direction maximizing the cutting effect (take a full pass whenever possible). If you are not going to be saving the cut material (such as to feed cows with), then it does not matter how many times you run over material already cut, but while you spend time doing that, you are not able to cut material that has not been cut yet.
Make sure to allow plenty of time to adjust your hearing protection and take on refreshments as needed. It is tempting, but don't give in to the need for speed. Keep your ground speed adjusted such that the ride is not overly bumpy and your tractor rpms such that the mower is running at it recommended speed. Drive around until there is no remaining uncut material in the area you want the material to be cut. Repeat as necessary.
As a final reminder, keep an eye on your gauges, making sure you don't overheat your valuable tractor. It may be necessary to stop on occasion and clean the screen in front of the radiator to prevent over heating. If it is your job, start at daylight and work until dusk. If it is your hobby and you're just keeping the place looking nice, work when you feel like, don't forget your boss (aka wife) may have other timelines in mind when you go out to mow. Tractor time is to be savored, not rushed or taken lightly.