Shinjuku is so mind-blowingly complicated that I get lost each and every time I go there. Despite extensive navigational preparation, GPS, Google Maps, etc., Shinjuku beats me every time. You have my heartfelt respect if you can successfully navigate Shinjuku.
You may wonder why I don't just ask for directions or hop in a taxi. I am a man, so I will do no such thing! That would be admitting defeat.