strip it to save weight and sort out the handling, cat back exhaust system to give you a bit of noise to make it more fun.
ive been there done that with the 16v engine and can tell you its not worth it at all touching the engine.
depends how much you want to spend but id go for the following....
HANDLING:
FK Coilovers (APEX -60mm kit if you cant afford coilovers)
15" wheels with 4 Eagle F1 195/50 tyres
Uprated brake disks and pads (possibly Brembo Max and EBC Green stuff?)
You could then go even further like i did and get front and rear strut braces & Powerflex suspension bushes
WEIGHT SAVING:
strip out the backseats, spare wheel & tool kit to save weight, if you want to go more extreme get a set of buckets to replace the front seats since they weigh a ton with the airbags in them.
FUN FACTOR!:
Cat back exhaust, Smaller racing steering wheels, B&M Quickshift
at the end of the day tho its only a 1.2, it will never be fast but theres no doubt it WILL be one of the most fun cars you'll drive with all they mods!