The document provides five ways for JavaScript developers to be happier: 1) Concentrate on the present and focus on creating rather than worrying about the past or future. 2) Limit distractions by streamlining your development environment and using an editor like VS Code that consolidates features. 3) Make mistakes less likely by using linters to catch errors as you code. 4) Get to know your tools better like debuggers to avoid console.log and gain insights to build better solutions. 5) Give back to others in the community by being helpful rather than causing drama.