self esteem

Dr. Marisa G. Franco

Psychologist and New York Times bestselling author on friendship and self-worth. Her blog posts on making adult friendships, belonging and self-esteem are free to read, and there is a free four-practice guide in exchange for your email.

Why I recommend it: useful for the part of career-building nobody teaches: making real professional friendships rather than 'networking'. The blog is free; the books and the speaking are paid, and the free guide costs you an email address and an ongoing list.