Visiting /r/blackhat , I stumbled upon a very easy to follow depiction of a .exe file. I always wondered this and when a person taught me this being 15 years old I just forgot it quickly. I believe it would also work for .dlls.
Cheers to Ange Albertini for creating this. He also has a lot of very nice cheatsheets of x64 opcodes, Java, Android under the Dalvik Machine on his personal website Corkami. They make for very nice posters at your place or just daily use cheatsheets.