Make sure the camera is turned on before you leave. This might sound silly, but it's like forgetting the plug in a boat, everyone is gonna do it eventually and it's a critical mistake. I leave my camera open while clearing in front of the camera to try take avoid this. Also, clear tall grass and low hanging branches in the camera's view within 5-10'. For deer and other big game, I try to keep my camera height about chest high and slightly tilted downward, but that's just personal preference. If you have it set on a trail, point it up or down the trail vs perpendicular or you'll get a lot of noses and tails if the trail is close to the camera.
I set my cameras to the maximum megapixel setting if applicable, as cards can hold a lot of pictures and you may need to zoom up to see specific items in the photo.