Did you enjoy the break?
Do you love your Rental Home as much as your own??
If you say yes to all three, you will have repeat business!! and good REVIEWS which means Referrals , which means MONEY!
Nothing sells more than enthusiasm and an approachable, professional, helpful and friendly landlord. (don't be over the top - encourage your guests to enjoy and care for the home)
If you are not around, make sure you have someone who will assist them in the unlikely event of them requiring assistance.