Make a lots of reading and surfing.
Bought a travel book, Agit in Seoul at Kinokuniya bookstore (the pink one).
It's about 1.5 inch thick.
What excites me about this book was not only it's full of tons information about zakka store / restaurant / interesting places in Seoul. There was random pages which was painted beautifully.
Look at these pages
little story behind each and every store..