The Chinese South is shown at the top of the Ba Gua, a mite confusing to us poor mortals in the West. Ignore this because north is still magnetic north wherever you live. Traditional Feng Shui consultants use a Luo Pan (Chinese compass) but ensuring accuracy is more important:
Hold compass at navel level
Remove metal objects including belts, bracelets, watches etc.
Adjust your compass until the red needle aligns with North
Always use a compass do not guess (even if you are an old “seadog”)
Exterior:
Stand with your back square to the property, at least 3-5 feet away. Distance yourself from large metal/electrical objects and cars. Take at least 3 readings from different areas.
Interior:
Finding the center of your home is easy if you live in a windmill or lighthouse but most modern houses have awkward L-shaped rooms. (It’s advisable to place something heavy in the corner of the missing area, such as an urn, statue or pot plant). Imagine the square is complete and stand in the center. Take your compass directions and plot them onto a diagram or plan of your property. Now refer back to the section on elements and enrichments and add these to your plan.
Congratulations, you have just completed your first Ba Gua. Before you think about rushing out to buy lots of objects, think about the elements first. Is everything in balance? Use your instinct to feel if something is right or not, and then check your Ba Gua. You may find that moving a few pieces around will “do the trick” without having to spend money. If in doubt hire a fully qualified consultant instead.
I have only been able to give you an overview here, but I hope you will enjoy letting more ch’i into your life and pursuing the subject further. For example exploring the intricacies of the Lo Shu Magic Square and discovering your lucky number!