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:
My Drunk Kitchen Apron
A fun project that uses the LilyPad MP3 trigger. This apron will dispense helpful kitchen advice and humor from the host of My Drunk Kitchen, Hannah Harto!
MP3 Trigger Hookup Guide V24
Incorporate sound into your next project easily with the MP3 Trigger.
Introduction to Operational Amplifiers with LTSpice
Picking up where we left off in "Getting Started with LTSpice," we delve a little deeper into LTSpice through an introduction of Operational Amplifiers (OpAmps).
SparkFun Inventor's Kit Experiment Guide - v4.0
The SparkFun Inventor's Kit (SIK) Experiment Guide contains all of the information needed to build all five projects, encompassing 16 circuits, in the latest version of the kit, v4.0a.
Or check out this blog post for inspiration: