So, my newest thing is to correct student emails before responding to them. Therefore, if you email me a piece of drivel containing no heading, no salutation, no capital letters (my current biggest pet peeve), no punctuation (except the fourteen exclamation points after "I really need this"), and no name at the bottom, I am going to email you back with the following:
"I'm sorry, but I had some trouble understanding your email. If you can make the corrections below and get back to me, I would be able to help you more effectively"
Then I make corrections. It's much more fun to correct bad emails then respond to them. It's only been 1.5 weeks of classes and I've done this 3 times. I know most of my students are mailing me with their smartphones. I don't care. I can use proper capitalization and punctuation on my phone, so can they.