These are gorgeous! Are you wanting only natural assets? It not, other things I can think to suggest are: blankets, books (either piled up or individual), mug of a warm beverage (tea/hot chocolate/mulled wine?), candles, a plate of pie (either full, or a slice).
If nature, I'm a little stuck on what else to add right now.
Looking forward to seeing more and what others might have to suggest!