Working out what you actually need before anyone draws anything.
A brief is the document that tells everyone else what you are trying to achieve, and most people arrive without one. What replaces it is a folder of images, which describes a look rather than a life — and a designer briefed on a look will give you one.
These guides cover working out what you actually need before anyone draws anything: how you use the house you have, what is genuinely not working, what the budget can carry, and how to write it down in a form a designer can act on.