For most positions it will be necessary to write a letter of resignation. It is best to keep this brief and to the point. Be honest about your motives if you ever want to return to that particular industry, otherwise you can just be honest. Don’t forget to state the exact date of your resignation.
An example of a letter of resignation:
Dear Mr. Pickwick,
This is my
best day ever formal notification that I am resigning y ippee!! from your cat food factory as senior consultant. The 21st of July will be the last day of my daily grind employment.
After careful consideration I’ve decided
to spend the rest of my life drinking beer all day long travel around the world and meet interesting girls people. See you around Sincerely,