How do I get started with reading comics ?

I know this has probably been posted a few times but I have been a big fan of the marvel movies since I was a kid when I first saw spider man and it blew my mind and now with the Marvel Cinematic Universe and just seeing Captain America 2 today I wanted to get into comic books. I have read up on wiki's and I know a few things like certain origin stories, story arcs and what not but i am still a noob .I dont know how people manage to store so much comic book information in their minds. I wasn't sure where to get started and how because I mean there are 75 years of Marvel comics to choose from and i didn't know which story arcs were important and witch were just filler stories or generally not good. Could Someone Help Me Please?

You just have to jump on the bandwagon, pick up a comic that takes your fancy and start reading it, that's how most people started.

Buy key events like, civil war, infinity gauntlet, dark riegn etc.