First step should be ride. Then... remove reflectors, post pics, post pics, maybe cut off the shovel in the rear or get an undertail, post pics, ride some, post pics, and ride more.... and then maybe get some other crap. Just my 2 pennies...
The basic things are to remove the reflectors and trim down the rear shovel fender by cutting it or just getting a new undertail. After that, the busa will look like "it should look"...