Zotero! It's a free reference manager.

You download their program and extension from their website (Safari is no longer supported, if you're using a Mac, so you'll need Chrome or another browser). Then, when you're on a website you want to save, you literally just push the extension button to save it to your computer. Along with a snapshot of the webpage, it automatically adds bibliographical information (e.g. author, date written, date accessed, etc.). When you're ready to add a reference list in Word, it automatically (!) makes a reference list for you!! There are a variety of citation types you can use, too.
Plus, you can add tags to each webpage/article so that they're searchable within Zotero. I always use whatever topic I'm working on as well as what the link is for (e.g. "roller coasters" and "Muse April 2018). That way, when I go to add my citations, all I have to do is search for the assignment (e.g. "Muse April 2018") and all of the references I used will show up.
Seriously, I don't know how I could stay organized without it!
...Oh, and the best part is it's free
