Qualification: Passed FE with mechanical afternoon section in Spring 2011.
For the morning/general section, the
Lindeburg Review Manual is pretty helpful. Good section-by-section review with plenty of practice questions that turned out to be very similar to (though sometimes a little bit harder than) what was on the test. I didn't use anything for the afternoon section as I was still in school and the major-specific material was fresher on my mind, but working through the manual had me set for the morning.
I'd also recommend buying a hard copy of the NCEES supplied reference handbook from the NCEES website and getting familiar with it. It'll be the exact version you'll get on test day, and getting where you can do bible drills with the thing will free up a good deal of time on the test.
One last piece of advice I'd give is to pick a day, sequester yourself, and sit down to work through a full-length morning practice test (the Lindbeburg manual has a few) using only the reference handbook and your calculator. It's the only way to really prepare for the mental toll 4 straight hours of problem solving can bring.
Good luck!