Summarize the following:
The combine header will need to be adjusted in relation to the height of the wheat for cutting. The header should be set to get the most wheat with the least amount of straw.  Try to ensure 8 to 12 inches of wheat stubble remains. This will help the soil keep its moisture.  Be prepared to constantly adjust the height of the combine header as the height of the wheat in the field changes. The header height determines at what point the wheat is being cut, and will therefore have to vary with the height of the wheat.  If you see that a lot of straw is being taken in, raise the header slightly. It is important to do this so you do not lose any wheat in the process. Going too fast will either knock the wheat down or cut it poorly. Going too slow can cause the wheat to fall to the ground or not enter the combine correctly.  Check behind the the combine to ensure you are not losing grain. If you are losing grain, you are likely going too slow relative to your reel speed. Check your combine’s manual for optimal settings to reduce grain loss. This will minimize damage to seeds. This will need to be adjusted as the wheat crops change. This process is where the grain is separated from the straw.  Lower speeds will do less damage to the wheat.  Finding proper cylinder speed will take some trial and error. Be prepared to adjust in the field. Setting the correct rotor or cylinder speed will also ensure no grain is lost through separation.  The concave clearance must be set in order that it does not crack the grain. This will depend on the particular crop. If the grain is cracking, widen the concave.  The combine will automatically separate and take the grain to grain tank. The cleaning shoe consists of the chaffer and cleaning sieve. Adjust it so that it is neither set too narrow or too wide. Consult the owner's manual for manufacturer's settings. Higher volumes of grain require a wider setting on the sieve. Be sure it is not set too low, or else the wheat will never make it to the back of the chaffer for it to drop through. Setting the fan too high will blow the light wheat right out of the shoe altogether.  Fast fan speeds help clean wet chaff, but can cause you to lose grain at the same time.  It is better to start the fan speed off high, and lower if necessary. Successful harvest requires that you be aware of how the machine is interacting with the wheat. Be prepared to change settings, such as fan speed, as you go. If a lot of wheat is on the ground as you go, it is a good sign that you need to adjust your settings. When the combine is full, dump the grain into a truck using the combine's unloader. Specific operation will depend on your combine model. Refer to the owner's manual if unsure. You or someone else can drive the truck to your storage facility. There, he or she can empty the truck by dumping it onto a grain elevator, where it can be moved by conveyor belt to storage. It helps if you have a separate person driving the truck. The driver can take a shipment of grain back to he storage facility, while you going the harvest. This increases your efficiency.

Summary:
Adjust the combine header. Adjust the reel speed relative to the ground speed. Set the rotor or cylinder speed to the minimum level for good threshing. Set the concave at the widest setting possible to help with separating. Adjust the cleaning shoe. Set the fan. Be attentive to the conditions around you. Dump the grain.