Map how sales, marketing or ops work actually happens today, then tighten it into something repeatable.
A process that lives only in one person's head breaks the moment that person is unavailable, and can't be improved because nobody can see the whole thing.
Document how work actually happens today, including the exceptions and workarounds, then tighten it into a process a new hire could follow.
A clear, written process document with ownership assigned at each step, ready to hand to a new hire or plug into a tool.