What additional maintenance should I do?

[Bluemarlin]

I've had my RX for almost a year now. All the usual service stuff is done by the dealer, but what things do I need to do that aren't part of the service schedule?

So far I've lubricated the caliper slide pins and changed the transmission and diff fluid. I also gave the underside, brake and fuel filler pipes/lines a spray of ACF-50 last year, and will go over it again in the autumn. I see on US sites where they do stuff like change the PCV valve, but have no idea if that's necessary, so is there anything else I need to do in terms of preventative maintenance?

Thanks

[PCM]

Just slide pins for me...

[m4rkw]

Couldn't hurt to clean the gutters where the seals are on the boot lid, mine were clogged up with gunk a while back and it caused rain water to leak into the car. Keeping them clean should pretend that.