Hart Caplan's newsletter is a reflective, philosophically grounded essay series on existentialism, boredom, emptiness, and attention, often drawing on therapy practice and recent research. Each issue develops a single argument through personal anecdote, philosophical reference, and engagement with studies, aimed at readers interested in the psychology of inner experience.

Essays on attention, decision-making, slow reading and craft, drawn from personal anecdotes and small observations about the examined life. The writing offers practical habits for focus and patience that a reader can apply to everyday work and learning.

A neuroscience-informed newsletter from a performance coach that examines habit formation, attention and social media, and supplements like creatine, citing studies and clear mechanisms. It offers practical, actionable takeaways for readers wanting to change behaviour and understand the brain's energy and reward systems.

A fortnightly letter by Clara Whitfield, combining personal essays on the slow, unglamorous middle of creative projects, reading habits, and the reality behind productivity advice. It offers reflective, candid writing that pairs personal anecdote with close examination of popular claims.