[Giorgio Palazzi] "It was when I tried to lock myself to music FCPX felt like a cold bath. "
Next door you can find the FCPX Techniques forum. For mixing and cutting Audio, the Jim Giberti technique is the go-to method so far.
http://forums.creativecow.net/readpost/335/29301
It's works very well. Whereas Jim spent a bit of time creating pseudo-tracks, I find I just need to make them as I go, but the organization is key, making sure each pseud-track is comprised of the same role.