A small reference notebook
Choose a subject below. Each note can be read on its own.
A useful observation begins with a small question. Decide which result would help answer it before choosing a tool. A short question makes it easier to collect enough information without gathering unrelated material that will be difficult to review later.
An action finishing is useful evidence, but the intended result deserves its own check. Review the part that another person will use. A working link, a readable page or a clear status can reveal a problem that was not visible while the action was running.