2004 and on is 2 year servicing , prior to that is annual servicing .
Plugs are at 4 years so check service book.
Visual inspection of the coil packs .. you are looking for cracks in the plastic caseing... misfire when wet if so .
Belt is at 6 years so again check service book.
I would remove the drive belt and check water pump and pully are all noise free and have no play.
I would remove the rear arch liners , remove the rubber disc on the drain if still fitted and clean out that area as per image.
If possible have every pipe waxoiled .. so all undertrays off and a good doseing .. a garage might be best here but its good preventative maintence .
Check the brake pipes n/s and center .. its under an L shaped panel .. there is a brake block there joining front to rear .. check the pipes in the brackets each side .. very common to corrode badly there .
Its worth jacking up and haveing a check of play top/bottom and side to side of every wheel.
Have a look o/s/f and wheel on a full right hand down at the power steering pipes .. if the ferrel has cracked on the low pressure then it needs a jubilee clip on it .
Have a good look at the exhaust .. seams splitting , clamps corroded etc etc
Tip oil and filter .. thats a must and if not done needs to be .
I think thats enough for now