First of all, go in with an open mind. Don't look at any other reviews or listen to anyone else's opinion. Your article needs to be as uncontaminated as possible. It might be the greatest film of all time but there are still minor flaws that need to be mentioned even in passing. It might also be the biggest piece of trash put on film, but considering the fact that hundreds of people labored to get the work to where it is means it has at least a few redeeming qualities.
Reviewers often get free stuff.
Exploit this fact as much as possible, just don't let things get to the point where anyone who gives you something for free gets a good review. If you have contacts, work them and keep them fresh. Don't ever let them forget who you are or what you are doing or for whom you are doing it. Essentially, stay on their radar. It's considered common courtesy to send a copy of your article to anyone who gave you something to review, even if you tore their product into tiny pieces and cut the pieces into pieces and boiled them and jumped on them and kept jumping on them until you could think of something even more unpleasant to do.