Even smoother shifting, check inertia weight
Check your shifter's inertia weight. I thought my shifting was fine before, but it's even better now!
I had my rear clam off last month for a host of small tasks and to my surprise I saw my inertia weight was interfering with a cluster of coolant hoses. The rubbing was enough to transfer the hose color onto the metal weight. Rather than simply elevate the hoses and hope they wouldn't sag again, I read here that some ground off the inertia weight (for completely different reasons than mine) and had no ill effects afterwards.
So, I dremeled my inertia weight off and the shifting is now like a glider chair - smooth with minimal effort. Honestly, I expected to need a little more muscle input without the inertia weight assisting, but my experience is actually the opposite given the binding I had before. Before, it was pretty notchy going from 2-3. Now I can do 2-3 with only my thumb and index finger!
I keep all the shift joints lubed anyways, but I didn't think the stock shifter could get any better. Color me impressed. No aftermarket shifters for me, but at least they look nice.