Clutch - you should change it, after so many km, along with fork and bearing. Big difference after that!
Coolant - good idea to replace, even if you think it's still fine. Will get rid of the interior rust.
A/C - good to insert new oil in the compressor. Long life.
Windshield - safety first!
Water pump - if it's not leaking or noisy, if you never had an issue with high water temperature, just make a visual check.
Gear box oil - "mine" was soooo dark and dense after 17 years and 190.000 km, like crude oil. So, give it a try. But first, check if you can unscrew "the in" screw! If that one is ok, go to "the out" screw and see if that one unscrews. If one is sealed in place and can't be unscrewed, leave it in peace.
Front wipers, electrics, decorations - do you thing!