1. Clean up. Meaning your home, and also your desk at work.
2. Set up your out-of-office message. Meaning your voicemail and your email.
3. Double-check all your reservations. Like flight times and hotel dates. It'll help you relax and not stress out about it. And if anything's wrong, you want to deal with it BEFORE your vacation starts, not in the middle of it.
4. Make sure you have all your documents together in one spot. Like plane tickets, your license, or your passport if you're leaving the country.
5. Charge all your devices. Like your phone, tablet, computer, and camera if you're bringing one. Then when you pack them, just make sure you pack the cords too.