5to6-codemod (tools to help you migrate from ES5 to ES6 syntax)
Webpack option: moduleDirectories: ['public/js', 'node_modules']
npm is the information super highway of JavaScript
webpack --display-modules (show me what I used to build my modules and why is it so big) webpack --verbose (shows where each module got included)
Webpack Validator (by Kent C Dodds)
Avoid writing webpack-specific code
no need to get rid of gulp/grunt
Jamund's car example is fantastic. You have a good car, you switch it for the fancy new thing, but you find that the old car was really what you needed.