Currently developing Effective Self-Help, a pilot project funded by EAIF researching the most effective ways people can improve their wellbeing and productivity: https://forum.effectivealtruism.org/posts/i2Q3DTsQq9THhFEgR/introducing-effective-self-help
For a scattered and poorly-maintained collection of things I’ve written and more general views I hold: https://bcswilliamson.com/