May not seem that important, but as a movie lover you have to be prepared and in the right state of mind when entering the cinema. There’s two main ways to go about this, so this will guide you through them both, but I recommend that if you go with a friend you are on the same page and therefore do the same thing.
This first one is all about previews. If there is a book you read it, if there are teaser trailers you are going to watch them all. No videos go unclicked. If possible you also buy as much merchandise as you can carry and cosplay your favourite character when going to the cinema. In addition to that you should also go to the premiere of the movie (if you are a hardcore fan) or within the first two weeks (if spoilers is something you want to avoid, but are not that committed). One month absolute maximum, and beyond that and you can’t blame anyone for giving up any spoilers. If you haven’t seen a movie that came out a while ago you might want to stay off any social media involving it. But this way is really about learning all there is to know about the movie before seeing it. Bottom line, you know exactly what you are paying for and you have also mentally prepared yourself for what is coming. One side effect of using this particular way of movie watching is that you might start seeing things that are inaccurate or different from the printed version or you might get disappointed, seeing as the trailers only view the best parts. And you will now have a cosplay costume lying around that was really expensive and that you will never use again… On the bright side you will get to freak out for when entering the cinema and the first part of the movie 'cause you've been waiting really long and can't believe you're actually seeing it now (!!).
Method number two is, as you’ve probably guessed, about remaining ignorant. It’s about choosing to trust your instinct when you’ve only seen a bit of the trailer. This one is a bit more risky, so if you’re not good at recognising a good plot from only knowing little about it I recommend you take the advice of the first method. Better safe than sorry. But this way can also be very interesting, as even trailers can contain spoilers, they can be tiny ones but often more than I personally wish to know. One example is Lord of the Rings: The two towers, which totally spoiled that Gandalf was indeed still alive just at the end of it. (If you haven’t seen the movie it’s been like 14 years it’s not a spoiler anymore). If you don’t have a sense for telling a good movie but is still interested in doing this than you could ask someone who goes by the first mentioned method, just make sure that that person doesn’t give anything up. This technique is very good if you want to be sure not to run into any spoilers before watching it, so it’s perfect for that kind of people, but really it’s just building up anticipation, in difference from seeing all the best moments of the film on YouTube first.
You can obviously mix the different ways up, learning a bit about what you’re going to see while still saving some for when you’re actually going to see it, which is to no one’s surprise more common but it’s not close to as much fun. But really you have just got to figure out what works for you and soon you’ll be watching movies like a pro.