The day before the professional installers arrive at your home, please make sure that all breakable objects are removed — not just from the room itself, but from walls and table tops where the installers will enter.
The installers will cover large areas to prevent dust and debris created when the old flooring is taken up, but you might want to cover smaller items yourself.
Visit the Preparing for Installation Guide for more information on what to expect before, during, and after installation.