Sure, you already know the obvious thing about libraries: free books! But if you are sincerely interested in sneaky ways to positively impact your budget, it is definitely time to revisit your local public library and see what's new.
At the Chattanooga Public Library, for instance, your card also gets you audio books, eBooks (Kindle?), online courses from Treehouse, kids activities, homework help, access to 3D printer technology...
That's a lot of stuff for free that would cost a lot elsewhere. Pretty sneaky, right?
Looking for Tips #1 and #2?