Step One: Getting A Phone Number--
The safe way to go is to call a friends house. This way if all else fails, you can always come clean and say its a joke and they wont be calling the cops. But you can only prank your freinds a few times before it gets boring...and they catch on. This is where teh phone book comes in. Thousands of people to call...and businesses to prank too. But then again if you're careless and forget to block your number (as i have many times) they'll be calling your house and asking to speak to your parents.
Step Two: Caller ID Is Not Your Friend--
Yes, Caller ID and *69 can be useful...maybe. But not when you're making pranks. Before dialing the number of your choice, ALWAYS make sure you block your number (*67 blocks it)m, otherwise you may have a few enemies calling your house theatening to call the cops.
Step Three: Be Prepared-- Before making your call, try and have an idea of what you;re planning to do BEFORE you do it. Otherwise you'll come up blank when you hear the infamous "Hello?" and start laughing. Check the "Ideas" section for some well...ideas!
Step Four: Be Original, Be Creative-- This is probably THE most important step. If you call someone and do the whole "is your refrigirator running? Well you better go ctach it!" the people you are pranking will be LAUGHING at you. The more creative and least obvious you are, the more fun it will be and the more angry people will get.
Step Five: DONT LAUGH!-- Even though luaghter is extremely tempting when the person oin the other end of the phone is being a dumbass...it will ruin the entire joke. If comedians laughed at theit own jokes all the time...it wouldnt be that funny. Plus if you start laughing you wont be able to go on with the joke, and you'll have to hang up.