Common Konglish Words
Remember that romanization is only a tool! Try not to depend on it too much and try learning the Korean alphabet and how to pronounce the letters properly and you will have a much easier time learning.
Some great books to get your started are Korean Made Simple: A beginner's guide to learning the Korean language and Become a Hangeul Master: Learn to Read and Write Korean Characters
Check out our Dom & Hyo ebooks below.
You can also find more products at our store 
as good as always 😀
커닝 (cunning) – cheating/cheat
서비스 (service) – complimentary [thing]
웹툰 (webtoon) – webcomic
First two are from Japanese, I think the third is homegrown.
Ooh I love this list! Another one would be 린시, or conditioner.