I am not a developer, but I still use the dev tools once in a while for editing something on the blog. If Chrome Developer Tools can help a non-developer like me that much, how powerful this tool can be, for developers?
Here is a video with a lots of tips for developers! I learned that I can do Ctrl + Z to undo changes I made using the inspector! I learned that I can see changes made locally and revert a change of my choice! For developers, I am sure there will be a lot more to learn!!!
A Bonus Tip
Thanks François Beaufort for this one! When you are in developer tools, right click the reload button and you will get a few more options than the normal reload, for example Empty Cache and Hard Reload
video via Addy Osmani