For prooof that some things in chemistry you never forget, consider this: yesterday for the first time since I was a Freshman at Minnesota (1980 - 1981) I ran a titration. Graduated column, phenolphthalein, the whole nine yards. I did a bang up job and had very reproducible results. Why was I doing such a thing? Well, one of our client's suppliers was running this is a QC test for semi-finished goods. I didn't think the test was very good and needed to prove it (which I did).
I always maintain that there are two activities in the world that make me feel young: stepping into the lab, and riding a bike.