To be fair, it's a 1.2, you're never going to see any real improvements no matter what you do (and I genuinely mean that in the nicest possible way).
Keep it well serviced and make sure the suspension/brakes are in good working order, and enjoy it would be my recommendation.
I bought the wife an 09 1.2 tce last summer and on the commute to work and back its brilliant fun to drive, OK you won't break speed records with it, and being honest I don't speed anyway (got the track/race car for going fast with) but for what it is it handles pretty well.
Learn your car, how it handles, how it brakes, where the 'power' curve is in the rev range and you'll find yourself enjoying it more and more.