One of the things that I love about RubyMine is the “Autoscroll to Source” and “Autoscroll from Source” depicted below:

And Sublime Text 3 doesn’t have this functionality natively. But you can add it pretty easily with the SyncedSideBar plugin available through Package Control.

As a matter of fact, it’s working brilliantly while I’m writing this blog post. Here is a cropped screenshot of what I see (this post is highlighted at the bottom left side of the image):

Having the file you’re currently focused on highlighted in the sidebar is amazingly helpful when you have a significantly large codebase. Or if you don’t have a significantly large codebase. It pretty much helps you no matter what kind of codebase you’re working inside :)