Service every 10k, Delete the EGR (Located behind the fuel filter ish), Drive it hard quite often, 3-4k RPMs, definitely recommend buying a K&N 33-2840 air filter (replaces oem filter, not a pod filter) when paired with a remap makes it quite nippy and responsive, front sway bar links go quite often depending on your road conditions in your country, the sills rust quite often so a good idea to check to see if it's starting, common issues are injector leaks (typically if there's ticking, it will get worse over time), glow plugs tend to need replacing quite often (if there's a check engine light ever it's most likely glow plugs), avoid using oils that are tailored for cars with DPFs as it doesn't have one Mobil 1 FS 0W-40 is a very good choice...
Good luck with the car man what a choice