1. try babying your clutch a bit while making absolutely sure your foot is flooring the clutch, especially when going to third
2. try avoiding "straight" shifts and do "s-pattern" shifts.
3. above all, CHANGE YOUR TRANNY FLUID ASAP.QUOTE]
I used steps one and three. I've always had an upright posture, but did find one click of the seat closer to the steering wheel gave me a better base for putting pressure on the clutch pedal without smashing my knees.
The transmission fluid was finally changed yesterday to Redline MT90. The factory fluid at 37k miles was crystal clear with no visible metal coming out along with it, but it's lubricating base was likely far gone.
Shifts are much much much smoother. Not nearly as noisy or ratchety as before. I'm very happy, and conclude this CASE CLOSED!