1. The Internet
Before I got a grasp on how to use the internet properly in middle school I was desperate for books suggestions. My low budget library certainly wasn't able to buy YA books let alone recommend them so I ended up reading the same things over and over again (Harry Potter!)
The internet has also led to items 2, 3, and 4 on this list.
2. Smart Phones (iPhone 4s)
Now I can take pictures, jot down ideas, look up books, use apps, etc., so I will never forget the title of the book I wanted to buy again. On my iPhone I have apps for Twitter, Facebook, Bloglovin, Blogger, Goodreads, Youtube. Everything I need to stay connected, anywhere I go.
Best book tracking site I have found so far. I formerly used AllConsuming but it was not as user friendly as Goodreads. The scan feature makes in-person book browsing a lifesaver.
More specifically, booktube! I had no idea so many people my age were book lovers and readers, and had obsessive thoughts about the books they buy the same way I did. The booktube community opened up a new perspective on reading and reviewing books, and served as a mean recommendation machine. This blog is a direct result of booktube - the more I read, the more I had to say, but no outlet for those thoughts.
5. The Kindle
I know this is a controversial topic - and I have to say, there is nothing quite like the feel of a paperback book in your hands. However, the Kindle has allowed me to expand my reading horizons, especially because Amazon likes to throw out some amazing e-book deals once a month (Kindle Monthly Deals) and once a DAY (Kindle Daily Deals). If I've heard a good recommendation on a book but didn't want to shell out the full price, and it happens to be on the Kindle Daily deal for $2.99 or less, I'm going for it. It's also really helpful at 10 PM when I absolutely need X book right now but the bookstores are closed. I don't think the Kindle or any e-reader will completely replace buying physical copies of books for me, but it has expanded my ability to read.