In Santa Cruz de Tenerife, shops are not open as long as one would assume; closed most Sundays and rarely operating past three p.m., at least most have some evening hours after closing for lunch break.  Department stores and supermarkets are open for business longer and more consistently, usually nine-to-nine.

While in Santa Cruz, pick up some inexpensive tobacco, perfume, and other such luxuries that do not suffer from the same taxes that burden these goods in America—though brace for customs dues.

Consumer experiences are best undertaken street by street, some of the best to be had around the Plaza de Espana and the Plaza de la Candelaria.  Check for Indian goods, electronics deals, and other quality retail to bring home.  Streets worth traversing for souvenirs and such would include Villalba Hervas, El Castillo, Bethencourt Alfonse, and Doctor Allart.

For hand-rolled tobacco stuffs, the Viuda de Gonzalez and the Estanco Milagros, both located at the Plaza de la Candelaria, are safe bets.

The Santa Cruz Flea Market is open on Sunday morning and makes for an interesting cultural immersion, while a more conventional consumer experience can be had at the Continent Shopping Center.