VIDEO : Emma Watson, Tom Hanks do social media right (like everything else)

Emma Watson is selective with her social media use. Watson told CNN at the Tribeca Film Festival premiere of her new movie "The Circle", "I think that it's so important to keep an eye on what your daily diet is." Watson's "Circle" co-star Tom Hanks is also wary of excessive social media use. Hanks said, "You can never predict, I think, how people are going to be willing to fill their time or to find themselves. How healthy it is, is probably only in the hands of the participants". Hanks' solution? He uses social media as a lost and found. The actor's Twitter account is famously filled with pictures of lost items he works to return to rightful owners.