Getting some good ideas here. SeanW having a nice idea with the dash cam, was actually considering doing that to my car with the amount of lunatics on the roads of Dublin I must say, some of my favourite modifications that I have a huge interest in is suspension modification. My personal favourite is the AirSuspension which allows you to control the exact amount of clearance between the car and the ground, however more viable option being either coil overs or lowering springs (savings of around 2000 quid )
Another modification would be changing the wheels. I have to admit I like the factory wheels on the Focus, but wheels such as the rotiforms are my personal favourites.
One of the major changes that is constantly bugging me is the standard factory Sony 6000 CD radio that I have in the Focus. There is no AUX connection, even though there is an AUX button on the radio itself, so was considering installing an aux socket, however think the better (visually) option would be to replace the unit with a fancy double DIN and make it look the business