Advice from experienced readers to younger ones?

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This has been a post a long time coming, but a recent conversation that I had crystallized it. Someone that I respect is a hiring facilitator (not technically a HR-type, but deeply involved in interacting with hires at non-degree-requiring, entry-level positions). This person complained about their interaction with Millenials, noting that they tend to show up to interview positions not correctly dressed, not armed with enough social graces (i.e. bad at small talk with new people) and just not very good at being in the working world. 
I am sure some of those comments are relevant to me as well; my generation (Gen X) was known as "the slacker generation" for a while there. (I don't doubt that macroeconomics plays a big role in all of this.) 
So, older Chemjobber readers (say 40 and above), what do you have to say about your younger coworkers (and people who wish to become your younger coworkers?) What criticism of their behavior do you have? E-mail etiquette? Time spent on their phones? Do they not afford you enough respect in meetings or listen to you well enough? Give it to us straight, so that we can change. 
[Chemjobber readers below 40, you'll get your turn next week. Please hold your comments until then.]