Consider for a moment how your phone is currently being answered. Professional courtesy is quite often not the standard for many college students. An abrupt "Yeah!" could be listed among the more courteous greetings. The more outrageous remarks will often buy you a major black mark in the professionalism category—even if it was your roommate answering your phone and acting crazy. A simple "This is ____" is always a pleasant change for a college student call. Make the change today, before the next (or first) employer phone call. If you have a landline, you should also encourage your roommate to do the same.
19. "Hello, you've reached [your name]. I'm currently [exploring Asia, hiking through the jungle in Costa Rica, hanging out on the beach in Bermuda] — or more likely, [recovering from extreme jet lag, googling ‘Are red spiders poisonous,' or looking for SPF 150 sunscreen] and won't be back in the office until [date]. Leave your contact info and reason for calling and I'll get in touch then."

Using this email disclaimer example will limit negligence and liability if you provide incorrect information that leads to damages. It also has a confidentiality statement at the end advising that if you aren’t the intended recipient, you are not allowed to copy or distribute the content, among other things.
You’ve reached [Company Name], the [company’s slogan]. Please choose from the following menu options: To speak with the operator, press 0. For customer support, press 1. For troubleshooting questions, press 2. For accounting questions, press 3. For a list of our staff members, press 4. To leave us a message, press 5. To repeat these options, press 6. After-Hours Greetings