So, before you take off, make sure that anyone and everyone who needs to know that you're on vacation and won't be regularly available has either a way to reach you, if necessary, or a date when you'll return. That way, you won't constantly worry that someone is trying to reach you when you're essentially unreachable.

More specifically, use an out of office message via your e-mail system, if one is available. And clearly post dates for when you will be able to return messages. If absolutely necessary, pick a colleague at work to serve as an emergency contact, and then give them a phone number where you can be reached.

You may also want to send out a quick e-mail to friends and family before you leave to let them know you're going on vacation and when you'll be back. And if necessary, provide a phone number or other contact information in case of an emergency.