Electret Mic Breakout Board Hookup Guide
Contributors:
LightningHawk
LightningHawk 
Resources and Going Further
A quick Google search for "Electret Mic Breakout" will get you going for any type of project you may want to create. Here are a few of my favorites from Instructables.
If you need to add sound to your next project but need something a little more sensitive, robust or a little more useful, I recommend the SparkFun Sound Detector.
Documents
For more audio fun, check out these other great SparkFun tutorials:
Build an Auduino Step Sequencer
Make a Step Sequencer using an Arduino, the Auduino firmware, and a handful of hardware.
Hackers in Residence - The ElectricBone
Drum machines and keyboards have been the standard for making digital music, but how do you make electronic music if you're trained to play the trombone? One of our Hackers in Residence, Carlos Mello, took it upon himself to find a solution to that very question.
Vibe-O-Matic 3000
We attempt to emulate a car seat to ease a baby to sleep.
I2S Audio Breakout Hookup Guide
Hookup guide for the MAX98357A I2S audio breakout board.
Or check out this blog post for inspiration: