Stop and Shop is your best bet for groceries on Nantucket - both Downtown and Mid-Island
If looking for alcohol, you have: Hatch's Package Store, Nantucket Wine and Spirits, Murray's Beverage Store, The Islander, and Old South. Epernay and BRIX also carry all three and will probably have your most diverse wine selections.
Happens to the best of us. No worries! Computer Solutions is good to get your iPhone or computer fixed, and they have various computer supplies available as well. For shipping needs, there is FedEx , UPS, and USPS.
We thought you'd never ask! As much as we live to be on the water, there are so many awesome things to take advantage of such as: