Tips for YA Lit:
Dialogue

Here are the unspoken rules I abide by when it coms to YA dialogue:
Be hip, but sparingly: "I'll pick up bae in my whip and we'll Netflix and chill."
Phrasing like this is over kill. It reeks of old person trying to act cool and speak on teens terms. If you don't know what "Netflix and chill" is look it up (so not innocent). Second, it excludes younger and older readers forcing your audience to only be in that five year high school range. Third, and most importantly, it times your piece as in future generations will not understand the slang used, even a decade out, you may not be able to sell novel. To combat this, I use it sparingly and in a way anyone can figure out, like "OMG" and "cray." It is more universal and still authentic. Another way is if you use something like "whip" in dialogue, then mention "car" in the prose following it to help define it subtly for the reader.

Be Realistic. Read aloud.
One of the things that will get me putting your book down and not finishing is unrealistic dialogue. As much as stereotypes suck, they exist because they are preconceived notions society has reinforced. Stick to gender stereotypes for the most part, unless the character is supposed to be "different." Guys that freely talk about their feelings usually make me role my eyes. Because of society's macho expectations, it should be a struggle for him. The struggle is far more realistically romantic anyway. Another stereotype is a girl freely talking about her feelings or issues with friends, which is a great realistic way to reveal these feelings or conflicts. To combat any off-kilter dialogue, I read aloud, sort of like a voice actor putting emotion into it. You can hear when it rings true and when it appears a bit cheesy.
Bigger is not always better!

Keep it short
In real life, we rarely even spout out a Shakespearian-length monologue unless in the event of telling a story. One great thing about Aaron Sorkin's work (The Social Network, Steve Jobs, The Newsroom to name a few) is his rapid-fire dialogue, how people's conversation volleys back and forth at a fast pace. It is utterly realistic to have a long conversation of short exchanges then to have a monologue followed by another. If I read long monologues that tell and don't show (if it's not a necessary story being told), I tend to skim ahead to just get the gist of it. I want to see the reaction of the other person more than just hearing the words. How people interrelate is way more interesting than just the words they say aloud. To combat this, break it up. Even if the other person simply gives them a look or sighs, it shows us interaction.
The age old propelling rule

Now that I started, I realize there are so many "rules" out there for writing dialogue effectively. I may return to add to this list one day, but for now I think these are the most effective in YA lit. Dialogue can make or break a book.
Stay tuned for next week's discussion on characterization.