As part of my job search, I tailor my resume and cover letter to match the requirements of the role being applied for.
An efficient way to do this is to have everything present in the source documents and then trim it down for the role.
Here is an iteration of my resume before tailoring. I do something similar for my cover letters. The important thing here once you have tailored your documents, let them sit for a day. That allows you (or at least me) to pick up on any errors and give the doccos a fresh proof read.