Essentially you are correct. If your tree and accompanying source information is in paper format then I would think a scheme that is consistent and which can be followed by a third party is what you are trying to achieve.
If your tree is in an electronic format, say from Ancestry, then your sourcing task is much easier. Ancestry has done much of the work for you.
Just be careful in believing anything you find on the internet; another person's tree is not credible source information. Every piece of information needs to be questioned and put into context.
I'm sure others at RC will jump in and expand / correct what I have tried to explain.
