It’s a variant of the suggestion often given in therapy and recently popularized by Jordan B Peterson I believe — and no matter what you may think of him as a person, it is a good strategy — “Treat yourself as someone worth taking care of”. Meaning: look at yourself as you would look at your own child, a pet, or anyone you would have the responsibility of looking after. It’s easy to miss meals, not dress yourself wel…
The thing about Jordan Peterson's book is that the chapter titles are usually _great advice_, but the content always tends to slide into his strange, mediocrely researched conservative ramblings and sometime worse, at one point he just about admitts that he blames one of his women patients for her own rape, at others he veers right into granddad style rants about young people and their "progressive politics" ruining the world.
Honestly it's a bad book and people would be better off literally just reading the Quora question and answer that inspired it.