configureStore.js

import { createStore, applyMiddleware, compose } from 'redux'
import thunk from 'redux-thunk'
import reducer from '../reducers'

const helloWorldEnhancer = () => {
  return nextCreateStore => (reducer, initialState) => {
    const store = nextCreateStore(reducer, initialState)

    const originalDispatch = store.dispatch

    const dispatch = (...args) => {
      console.info('dispatch: start', ...args)
      const result = originalDispatch(...args)
      console.info('dispatch: end', ...args)

      return result
    }

    return {
     ...store,
     dispatch
    }
  }
}

const finalCreateStore = compose(
  applyMiddleware(thunk),
  helloWorldEnhancer()
)(createStore)

export default function configureStore(initialState) {
  const store = finalCreateStore(reducer, initialState)

  if (module.hot) {
    // Enable Webpack hot module replacement for reducers
    module.hot.accept('../reducers', () => {
      const nextReducer = require('../reducers')
      store.replaceReducer(nextReducer)
    })
  }

  return store
}

I tentatively disagree with myself that this is a hello world because I'm not sure customizing dispatch is the most obvious case for an enhancer.