heres my contribution

8. weight reduction

As honda dont put out too much power in stock form they rely heavily on power to weight ratio hence keeping the weight to a minium is a good idea...you can start by bolt off what ever weight isnt neccessary for example

1. spare tyre (space saver)
2. spare tyre floor cover
3. parcel shelf
4. rear seats
..etc
*note: be sure to know what is legal and what is not for example taking out rear seats is illegal as the car is registered as a 4/5 seater taken it out would make it a 2 seater hence legal reasons
*spare tyre is simply for piece of mind...

then you can start changed parts to reduce weight most common

1. light weight wheels
2. bonnets (cf)

hope its right

awesome work zdster