Find an online "Jersey Shore" name generator. Websites such as Unlikely Words, Quiz Rocket and many more have such a feature.
Enter your first name, and choose if you want a "guido" or "guidette" nickname. Click your generator's version of the "Submit" button and see your nickname.
Play with the generators to get new nickname suggestions by varying the spelling of your name, capitalizing or un-capitalizing the first letter of your name, or including your middle initial until you come up with a name you love.
Tell all your friends about your new nickname so you can leave your average moniker behind for good -- or at least until it ceases to be funny.