Friday is April Fools Day - so get a leg up and trick them with some of these things!
(Courtesy of the Detroit Free Press)
One of Facebook's most important functions is a reminder service for friends' birthdays.
So, if allowed quick access to a friend's Facebook page, change his or her birthday and watch the unknowing but sincere good wishes flow in by the dozen.
It's best here to pick a date that isn't April 1 -- people will be on the lookout for a prank -- but pick a date soon and wait patiently for the payoff.
And beware of Facebook engagement or divorce announcements on Friday. Chances are they're a trick.
Find a Facebook friend -- preferably one that you have many mutual friends with -- who is willing to join in on the fun and swap profile photos and names with her or him.
Doing so instantly creates the impression to your mutual friends that you are the other and he or she is you, causing confusion.
See how long it takes your friends to realize they've been talking to the other.
Lost in translation
Many of the Internet's top Web sites have versions in hundreds of languages for use worldwide. Some of those sites have fun languages hidden in there, too.
On your friend's Google.com home page, head to the settings and change the Interface Language to Elmer Fudd.
Your friend will now be asked if he'd like to perform a Google seawch. Or he can tell the search engine he's feewing wucky.
Facebook, too, includes support for a host of languages, including the ever-important pirate dialect.
To change this setting, scroll down to the very bottom of any Facebook page and select where it says "English." Change the setting to English-Pirate and the whole Facebook experience reboots under the new language.
Your friends -- hearties, actually -- are now listed as cap'n or matey, the news feed becomes your shiniest booty and the inbox is your bottle o' messages.
Another option will turn all your friends' text upside down, causing a less-obvious but equally maddening experience.
If given access to your friend's smartphone, swap out his or her wallpaper with an image of broken glass.
Do a Google Image search for "broken screen phone wallpaper" for images that are made to look like a real phone screen.
After you add it to the phone, watch your friend's expression drop when he or she sees the phone's screen has been shattered.
This one will be a quick trick -- the prankee will figure it all out fast -- but the moment will be worth it.
This one is a classic.
Take a screen grab of someone's computer desktop, with all the messy icons strewn about. On a PC, you can do this with Control-Print Screen. On a Mac, it's Apple-Shift-3.
Then gather all the desktop icons, taking care not to lose any, and drop them in one folder on the desktop.
Then change the computer's desktop wallpaper to the screen grab of the various folders and icons.
This creates the illusion of the old desktop and when your friend returns, he or she will click endlessly on the folders to try to open them, but won't be able to.
The Fake-A-Call smartphone app for Android and the Apple iPhone lets you schedule an incoming call that behaves the same as a real call would.
Leave your phone behind as you head out of the room and a phone call could come in from the White House, Oprah Winfrey or any other name you type in.
If you're doing this to someone else, you can pre-record the voice on the incoming call or use one from the app that will interact with your friend just like a real call.
This app is also good year-round for getting out of a meeting or an unfortunate date.