If time permits, shower and put on fresh clothes. Choose a comfortable outfit that is easy to stretch in.
Have some mints for fresh breath and drinking water handy.
Turn off phones and try to limit other distractions.
Music is helpful to set the mood. Keep a selection of your favorite CDs nearby.
For a more romantic setting, light some candles.
Keep pillows and a blanket handy; make sure you have enough room and remove any clutter.