I would attack the parts that are the hardest. There is no point for practicing the easy parts relentlessly and avoiding the hard parts. If you do that, then you are enforcing the good, and the bad doesn't ever get better.
So, start with the hard stuff first, then work to the easy stuff. Don't neccessarily feel that you have to start at the beginning of the piece either. Sometimes it works better to work the piece backwards.
And give the "playing it backwards" thing a try. That helps sometimes. Try different articulations [tongue slurred passages, and slur tongued passages, slur two tongue two etc. etc.]
ALWAYS USE A METRONOME!!!!!!!
LISTEN TO AS MANY RECORDINGS AS YOU CAN!!!!!
[If you send me a private message with your email address, I would be happy to send you a recording of me playing it with my University Orchestra last year. It's not perfect by any means, but it's not too shabby. I'm definitely a lot better now.] Or... I think it might be on my myspace.....
http://www.myspace.com/fluteguy18
check there first. If it isn't there, then message me.
Other tips..... Just be innovative! Be a creative practicer. Try playing the passage smoothly once, then aggressively the next. Try playing it waaaaaaaayyyyy too slow, then work it up until it is way too fast. And don't be afraid to write on your music.
OH! Memorize it too! I did when I worked on it. Memorizing it is what helped me win the Concerto Competition [and then I got to perform it with orchestra -see above ^ ].
Yeah... I think it's on there.