Very nice car
I would probably have got one of these in the end if I was still in the UK, but they are SO expensive here in NZ! Also nice to see UK hypermilers now - I felt like I was the only one while I was there.
I would say remove the spoiler, make some nice, removeable rear wheel skirts, sprayed in the same colour, that can be unclipped for changing tyres, leave the aerial tucked in when possible, fold the passenger mirror when not needed BUT be careful to look for bikes etc when moving off at traffic lights. When the tyres are getting close to time for change, try to change to either LRR tyres if you can (I wonder if the Honda Insight ones would fit?), or at least get tyres which have a high sidewall pressure so you can pump them up a lot.
Since you have the VTEC model your economy won't be as good as the HF models. However, given the light weight and the good aero, EOCing will likely return huge increases in mileage. If you had a fuel economy gauge that would probably let you get very high MPGs in a short time (note that I got 42MPG max in a Bluebird Turbo in the UK, but this went up to 65MPG for short-commutes with a cold engine, across a whole tank, once I had a SuperMID installed!). My SuperMID is here but I do have a spare in the UK if you were interested!!