First, pay just a few pennies, and post it in your local newspaper with your name behind it. You may do this in the classifieds under personals, or in the legal announcements. Just state the quote, your name, and the date you want that you first thought of it. The date of the newspaper will account for you owning it in case it becomes used in the title of a song, or the basis for a new show. You can then spend some money and time and Copyright your quote if you wish. It will be up to you to market it to make monies if that is what you are after. Good luck with your endeavor.