As most of you pointed out in the comments of Part 1, creating a query is hard work. Thank goodness for cyber space.
Here are some links for great places to learn the ins and outs of query writing.
Elana has an awesome exercise she employs when writing queries.
Author Nancy Parra wrote a four-part series on writing queries.
Agent Janet Reid hosts Query Shark, a raw, brutal place for learning how to write an awesome query.
There are tons of other places full of information on writing a great query. Agent blogs are incredible founts of information.
When did you first realize you had to write a query before you could submit a manuscript? What's your favorite site for gleaning query information?