I read a blog post (or two or three) in the past that cautioned about mentioning new technology or the names of current popular songs, movies etc. in your book. And yet a very popular YA series I'm reading mentions these things all of the time.
So here's my question, what do you do? Do you write cellphone, texting, iPad, laptop, etc.? Would you write that your protagonist went to see "The Help" or had Katy Perry's "Firework" for a ringtone? And does it make a difference if what you mention is a classic, like a Beatles song or a book like "The Catcher in the Rye?"
Would love to hear your thoughts.