Prepare food for the day so you don’t have to focus to much on deciding what to eat and drink.
Cover and/or turn off distracting devices (If you must keep one on for timed meditations, keep in Airplane Mode). You don’t want to upset your retreat.
Set up a Vacation Message if you think it’s necessary for your own peace of mind.
Light a candle at the start of your retreat and blow it out at the end. It’s a great way or remembering you are on retreat. Alternatively, place out a stone, or vace of flowers, or another meaningful object that will be an appropriate reminder for you that you are on retreat.
Wear comfortable clothing and have enough blankets and other supports. You’re creating a nest that for the day, make it a nice one.