Vlog: How to Query: The Query Letter

So you've set up your list of agents and your manuscript is ready to go, which means you need a query letter. Here's how to get started and a few things to remember while writing your query.

 
RELATED LINKS: 

How to Query: Research (vlog)Query & Pitch Tip: DETAILS5 Things You Don't Need in Your QueryHow (Not) to Write the Perfect Query LetterHow (Not) to Write the Perfect Query Letter (Part 2)Query Critiques: More Important Than You ThinkSo Your Manuscript is Ready...But is Your Query?
What tips do you have for query letter writing? 
Twitter-sized bite: 

Struggling to write your query letter or don't know where to start? @Ava_Jae vlogs about what goes into a query. (Click to tweet)