This may seem obvious, but if you want more reviews and faves on fanfiction you need to have content that is worth reading.
This can also mean writing for a popular pairing instead of an obscure one.
Make sure that first chapter has a great ending line and a strong start and don't be afraid to ask people to drop a comment.
Advertise for your story on places like Livejournal as well.
Or bribe people. You know how we do. ;)
All from a original content and fanfic writer w/ a somewhat popular fanfic in the FFVII category.