If you use Chrome DevTools, there are a few resources that I think are really useful for getting the most out of them and making the workflow a bit easier.

Paul Irish has a great roundup here :

https://youtu.be/HF1luRD4Qmk

Umar Hansa has a great mailing list for DevTools tips, and there are some good ones to browse here :

https://umaar.com/dev-tips/