Listons - the only place in Dublin I could find black beans and quinoa (#californiagirlproblems). Health food and a good (affordable) wine selection. (Camden St)
Tesco - locations everywhere, and best prices for processed foods.
You’ll have no trouble finding the staples of Topshop and H&M in the Grafton St area, as well as across the river. Here are some less mainstream places.
Avoca - All right, this isn’t really off the beaten path. This is the Irish equivalent of Anthropologie (except a bit more cutesy). Give yourself time to explore; the cafe on the top floor is also excellent. Suffolk St.
Find - This boutique compiles excellent antique small furniture, decorations, clothes, accessories, and odds and ends. Cow’s Lane.
Industry - Household items, gifts, notebooks and odds and ends, but curated with the finest design sense you only wish you had. West Essex St.
Cow’s Lane Designer Studio - Support local artisan handicrafts; selection changes. West Essex St.