How do I balance any object?

Let’s assume a few things here. The object(s) is strong enough to hold itself up. There are no other external forces other than gravity acting on the object or they are minimal enough to not effect the object. Lastly it has enough friction to hold and not slip.

I’ve seen pictures of people who have made towers out of random objects. How do they do it? I think the basic concept is find a point for the object to balance on, then try to center the weight all on that point.

Somehow I feel there is more to it than that or at least a trick for them to find that sweet spot more easily. I really want to learn the process. So any tips or links would be appreciated.

Although if there is some deep explanation that would help me better understand how to do it, that would be appreciated as well.