HOw to find a literary agent

For those who have been following my blog, you know that I am documenting my journey to publish my YA novel, Midas and the Golden Child. I am currently querying agents for representation. I have submitted my query letter to my critique buddies on critiquecircle.com as well as receiving advice from family. I thought I would share some of the advice I have received from these groups as well as online articles related to the topic. 
From Family: Looks good. I’d read it. (Level of helpfulness: 0)
From Writing Resources: Looks OK. Unfortunately, you need it to be remarkable (whatever that means).  It’s too long It’s too short There’s not enough plot mentioned Try to get to the point of the plot quicker.  Reword it like this:  No, no, that’s not good, reword it like this instead.  Don’t put hanging questions. State the goal of your characters instead. Example online: full of hanging questions.  Be quirky and witty Be straightforward and to the point
A couple replies from agents:  Looks interesting, unfortunately, it’s not quite what I’m looking for on my list. Strong project, unfortunately, I don’t have any contacts for a project quite like this.
So what is the best way to write a query letter? Who the hell knows.