Maintenance and TLC on my new-to-me 2000 w/ 208k on the clock. Been a nice long bonding weekend with the 'ol gal.
-Oil (M1 Syn 5W-30 High mileage and M1 20k mile filter).
-Changed front/rear diff fluids (Amsoil)
-Changed transfer case fluid (Amsoil)
-Greased front/rear shafts at slide yokes and spiders (Amsoil)...side note: No more clunk/thunk when I stop!

-New Heater T's, went ahead and got all new OEM T's and hoses. If it lasted 200k it will last another 200k with stock components.

-Drained 2 qts transmission fluid (all I could get out) and replaced with M1 Syn ATF
-New Intertstate Mega-Tron battery
-New Spark Plugs (Donso's)
-New Subs in the back (Dayton Audio 4" aluminum) Sounds pretty good! Better than what it was and was cheap enough to try.
-Conditioned all leather (Lexol conditioner). My leather was in really good shape considering age but just feels to much softer now.
If you need incentive to change your spark plugs sooner than 200k miles then here's evidence. Note the plug second from the right-it has seen better days. It came out of the third cylinder from the front-passenger side. With the new Denso's in there is a noticeable performance improvement!
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Had to modify the stock box to fit the new subs. May not look pretty but its an airtight fit that gets the job done. They actually sound pretty good for less than $20 each-at least better than what the 17 year old stock subs were putting out these days. Not up to the sound quality I would like it to be but my whole sound system needs a major overhaul-future project.
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Finally, used Meguire's Headlight Restoration Kit on the front turn signal housings and fog lights. Night and day. Ive used this stuff on numerous cars and it always turns out great. Not a permanent fix but definitely worth the ~$20 for the kit. Usually lasts about 6 months until they start looking a little foggy again-then just do it again. Still cheaper than buying new lenses

Here's a little before/after:
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