I just marked 20 years from high school, and I’m on my second career. There is no way I can include all of my relevant work and volunteer experience, plus my professional degree, in one single page. Young people should have a one-page resume, but not necessarily people who are “of a certain age.”
There’s a happy medium there, too. I don’t include *all* of my jobs or all of the post-secondary education I have had. I keep it to the more interesting and relevant items.
Otherwise, solid resume advice.