Because our place is billed as a "luxury" listing, we do quite a bit to make our guests feel welcome. We ask beforehand if the guests have any allergies, and if the adults drink tea, coffee and alcohol. So far, it has been "no" every time to question 1, and "yes" to questions 2 and 3.
We then leave coffee pods for the coffee machine and fresh coffee for the French press; a variety of tea bags; a bottle of Vinho Verde (Portuguese wine) for short stays, two bottles for longer stays; 1-2 bottles of spring water; a few small bottles of beer (depending on the number of guests and length of stay); juice boxes if they have kids; some toiletries (hand cream, mouthwash, toothbrushes and small tubes of toothpaste) in gift bags on the table; and small bags of biscuits/cookies and crisps/chips.
So far, our guests have appreciated this a lot. Every single guest has immediately written to thank us for this after they have arrived.
We know it is an expense, but as I said, we charge more than a lot of our neighbours specifically because we want our guests to feel pampered. And based on the responses, they do seem to be feeling that way--and that makes us happy.
Our hosting experience has taught us a few things that we may want to change down the road. But so far, this isn't one of them.