Basic field craft is helpful. Know where your target animal is watering, what they are eating, what time of the day they are eating and watering, know that certain plants can hydrate you and give back nutrients you spend hunting and walking, know that certain other plants are effective medicinally and as an insect deterrent, knowing how to start a fire from nothing is helpful as well as carrying the tools necessary to do so, basic tracking skills and identification of scat is also helpful in locating your target bird.
As an example, know local water holes and food sources and in desert and semi arid regions know what time of day they are watering because in these areas especially in the winter water holes may freeze over until 9 or 10 am when the sun thaws them. I know that quail in my area usually water sometime between 8 and 10 am in the winter depending on if water sources are frozen or not. I know the quail where I hunt usually water at overflowing stock tanks that the ranch manager allows to overflow to create small ponds and watering holes for deer and quail and that there is really no other water source in the areas I hunt. I also know the quail enjoy thistle seeds, seeds from native grasses, fruits from prickly pear cactus and sand plums and where to look for these plants, and they will also move on to corn fields in the early morning and fill their bellies before coming to water. I can differentiate between quail and pheasant tracks and scat as well as identify whether coyotes or bobcats have been in the area and whether or not the tracks are from that day or not depending on how much dirt and dust is blown back into or over the tracks. I can generally tell where the quail will be bedded during the middle of the day. Know that wild fruits like prickly pear fruits and sand plums can rehydrate you and are tasty while out in the spring running dogs. Know that plants like prickly pear pads, mesquite, wild mustard, wild onions are helpful as antiseptics if prepared correctly and some are used in home remedies for cold, cough, and asthma. Wild onion can also be put on the skin as an insect deterrent. If you plan to venture far from your vehicle in strange territory you might want to carry a blast match and a small amount of tinder or cotton balls soaked in alcohol or vaseline to use as tinder in case you get lost or injured that way at least you can start a fire to get warm or signal someone for help. Knowing how to locate direction by the sun even on a cloudy day is helpful in case you get lost. Knowing when to rest and how long to rest to avoid heat stress or when to keep moving to avoid hypothermia is helpful.