Matte black grille:
One of the first changes was blacking out the upper grille with some matte black vinyl that I had laying around. Quick and easy, and a rather noticeable change to the front end.
Ti fog light bezels and tinted fog lights:
Mini 'guide' for the swap can be found here: New Canadian member with a '12 Focus
Working for a Ford dealership, I regularly pop into parts and hand the guys another part number for something I want. Still in the Focus' early days, I ordered some OEM Ti fog light bezels and swapped them in place of the chrome SE/SEL pieces.
Rather than take out the headlights, I pulled out the under-bumper shield and worked from below.
With the fog lights out anyway, I also went ahead and redid the yellow vinyl tint I had previously applied, since I had better access.
Tinted rear bumper reflectors:
There's not much to say for this one, the two rear reflectors were tinted with some extra vinyl that I had from my Grand Prix.
About a month after bringing the Focus home, the tires were swapped for Goodyear winter tires, and the bumper, hood, fenders, and mirrors were treated to a 3M clear bra. Fortunately snow turned out to be a ways off at that point, but I wasn't going to wait until after it hit.