Occasionally, someone you know will ask you to submit a personal (or character) reference for him or her.
A character reference is a reference from someone you know personally, rather than a former employer.
You might be asked to write a personal reference for a neighbor, acquaintance, advisor, or someone you volunteer with.
Source - Read More at: www.thebalance.com
If you have not been asked to write a character reference for someone, chances are you will be at some point in the future.
This is a terrific guide that offers sample letters, that are very easy to customize.
Take notes, and wow your family and friends by the awesome letters that you will be able to provide, with a moments notice.