Congrats on your Zed
Mods wise here are a few I've done/planning if you want some inspiration:
Cosmetics-
I had aero body kit on my previous pre facelift Z. Gives the car a more aggressive front end and IMO enhances the overall look of the car.
Angel eyes I like a lot but look a bit of a nightmare to fit, plenty threads on this, so I haven't tried... yet.
'De-ginger' the headlamps and indicators. If the orange of the headlamps and side repeaters insult your eyes then you can replace with clear to achieve a facelift look. As above with angel eyes, not for the feint hearted!
Stubby aerial to replace the 'whip'. The gentle mans choice
I recently replaced the oem gear knob for a ZHP job. Recommended by quite a few people here for looks and improved gear changes.
I retrimmed my dash in carbon vinyl. Bit of a nightmare job but preferred it to aluminium.
Pic of ZHP and retrim
Function-
I fit an aux input so I can play my Iphone through stereo with no loss of sound quality. East to do and cost £10.
Other-
I never got round to this (wasn't aware when I had my 3.0i) but some peoples have removed foam from the sound generator to increase the sweet sound of that NA straight six in the cabin (assuming you have 3.0, can't see from photos).
Gaptech lets you raise and lower roof remotely from your key fob and allows the roof to operate from one touch of dash control (rather than holding button down). Looks pimp 8)
That's a few to get you started. Sure others will add to this list to whet your appetite!!