A couple of DIY additions that work well for me.
1. Regular applications of a very small amount Finish Line Stanchion Fluoro Oil. (Just enough to wet the wiper.) I use it on both the fork and dropper post. There is a noticeable improvement in performance, particularly on dropper posts carrying a seatbag. A bottle weighs a few grams and lasts for more than 100 applications. We also use it on my wife’s full-squish trail bike.
2. Inserting a closed-cell foam block into the bottom of the steerer tube. This keeps the tube clean and seems to eliminate star-nut corrosion and related premature failures. The block is cut big enough to stay in place with a 48″ x 3/4″ static strap and buckle, a 48″ x 3/4″ length of OneWrap, and some zip ties stored in the resulting space.