The most precise clocks we have are atomic clocks which are powered by quantum mechanics. Besides keeping time, they can also let your smartphone know where you are.
Looking to learn more about quantum physics? Here’s a selection of material to get you started.
Articles

You’ll find the latest news and articles in Scientific American’s section devoted to physics
http://www.scientificamerican.com/physics/ 
Here’s “Quantum Computing 101″ from the Institute for Quantum Computing in Waterloo, Canada
http://iqc.uwaterloo.ca/welcome/quantumcomputing101 
And all the latest quantum computing news from the techwriters at Wired
http://www.wired.com/tag/quantumcomputing/ 
What about the prospect of a quantum internet? Nature looked into it
https://www.nature.com/articles/d41586018018353 
The question is no longer whether quantum theory is correct, but what it means, contend writers at Scientific American
https://blogs.scientificamerican.com/observations/comingtogripswitht... 
Physicist and author Chad Orzel puts forward six things everyone should know about quantum physics
https://www.forbes.com/sites/chadorzel/2015/07/08/sixthingseveryonesh... 
What is quantum cryptography? Popular Science has a guide:
http://www.popsci.com/whatisquantumcryptography 
CQT's founding director, Artur Ekert, on quantum cryptography
http://plus.maths.org/content/os/issue35/features/ekert/index 
The New York Times reports on experiments that closed loopholes in measurements of "spooky action"
https://www.nytimes.com/2015/10/22/science/quantumtheoryexperimentsai... 
Arguments for  and against  the existence of parallel universes
https://blogs.scientificamerican.com/guestblog/areparalleluniversesu...  Current thinking about Schrödinger's cat
Books
Why not find a quantum book that suits you? Here are some reviews of good books about quantum theory:

Something Deeply Hidden by Sean Carroll
https://www.nature.com/articles/d41586019026028 
Beyond Weird by Phillip Ball
https://www.nature.com/articles/d41586018032728 
Through Two Doors at Once by Anil Ananthaswamy
https://www.goodreads.com/book/show/38527619throughtwodoorsatonce 
What is Real? by Adam Becker
https://www.nature.com/articles/d41586018037932 
The Quantum Astrologer's Handbook by Michael Brooks
https://www.theguardian.com/books/2017/nov/24/thequantumastrolgershan... 
Entanglement by Amir Aczel
https://www.publishersweekly.com/9781568582320 
Quantum by Jim AlKhalili
http://www.goodreads.com/book/show/100034.Quantum 
Quantum Theory Cannot Hurt You by Marcus Chown
http://www.independent.co.uk/artsentertainment/books/reviews/paperbacks... 
The Quantum Universe: Everything That Can Happen Does Happen by Brian Cox and Jeff Forshaw
https://www.brainpickings.org/2012/02/13/thequantumuniversebriancox/ 
The Age of Entanglement: When Quantum Physics Was Reborn by Louisa Gilder
http://www.goodreads.com/book/show/5096882theageofentanglement 
Genius: The Life and Science of Richard Feynman by James Gleick
http://www.goodreads.com/book/show/98685.Genius 
The Fabric of the Cosmos: Space, Time, and the Texture of Reality by Brian Greene
http://www.goodreads.com/book/show/22435.The_Fabric_of_the_Cosmos 
Erwin Schrödinger and the Quantum Revolution by John Gribbin
http://www.telegraph.co.uk/culture/books/bookreviews/9188438/ErwinSchro... 
Strange Beauty: Murray GellMann and the Revolution in TwentiethCentury Physics by George Johnson
http://www.goodreads.com/book/show/258459.Strange_Beauty 
Quantum by Manjit Kumar
http://www.guardian.co.uk/books/2008/nov/15/quantumphysicseinsteinboh... 
Programming the Universe: A Quantum Computer Scientist Takes on the Cosmos by Seth Lloyd
https://www.nytimes.com/2006/04/02/books/review/welcometothemachine.html 
How to Teach Quantum Physics to Your Dog by Chad Orzel
http://www.timeshighereducation.co.uk/story.asp?storycode=413835 
Knocking on Heaven’s Door by Lisa Randall
https://www.goodreads.com/book/show/11297438knockingonheavensdoor 
Quantum Physics – A first Encounter by Valerio Scarani
http://www.goodreads.com/book/show/100028.Quantum_Physics 
Decoding Reality by Vlatko Vedral
https://www.goodreads.com/book/show/6739077decodingreality