I'd like to poll the collective wisdom of experienced hunters.

What do you use as a shooting aid in the field? Please also mention what type of terrain and hunting you are doing. I'm mainly curious if most use a sling as a shooting aid, but let me know if you use a bipod, sticks or a pack. If you use a sling do you just have a simple strap and use a hasty sling? Anyone use a Rhodesian, Ching or 1907 style loop sling?