As someone who has forgotten her field hockey stick when headed off to field hockey camp,
I've learned to love lists. A list for what clothing items to bring, (sneakers need socks!); a list of what needs to be done beforehand (schedule a manicure and pick up dry-cleaning); and a list of toiletries. Mundane things like a toothbrush and mascara sound obvious, but as your bag seems to get fuller and fuller, the things you actually need for the weekend seem to get left at home.
Aerin large cosmetic bag
Embroylisse cream
Hampton Sun after sun moisturizer
Diptyque travel candle (most ocean side rooms smell of eau de must!)
Elizabeth Arden 8 hour cream, fragrance-free
deodorant
By Terry sheer rouge
Aerin comb
Marvis travel toothpaste
images courtesy of Net-a-Porter.com