Right-click & drag Zoom, just like Audition
It would be REALLY great if Premiere borrowed Audition's right-click+drag to Zoom feature, and implemented it on all timeline rulers. It's so much faster than switching to the Zoom tool all the time to do the same thing.
Clint Porter commented
Haha I just came here to suggest this, but it looks like me from the past did it already. Still a no-brainer to add this to all Adobe apps with timelines, if for no other reason than UI consistency's sake.