A cool frood who really knows where his towel is
You can set a shortcut to create a chapter marker (red) and flash cue marker (orange I think?)
You can also use shortcuts to load your track height presets.
And you can use shortcuts to color any selected clips.
I'm really surprised you didn't mention that. Without shortcuts, these things won't speed up your workflow.
I made a 3-hour long Premiere tutorial with tons of info, https://www.youtube.com/watch?v=Hgd5opjklrg and I have a 4-hour one coming out soon, which will show how I use macros and scripts on top of Premiere's normal shortcuts, to achieve a very fast workflow.