I buy almost all of my clothes online. Shopping in clothing stores is becoming less and less appealing. The sales staff often seems inexperienced and poorly trained. There is an emphasis on cramming as much stuff as possible into least square footage. Merchandise is illogically organized. I'm a 10 - 14 petite and I find it hard to locate stuff in my size on the sales floor. Even the biggest department stores put their petite section in some dim remote corner of the store and have minimal offerings. I hate trying on clothes in stores. It takes too much time and I hate the lack of privacy.
I have four or five online sites that I've been buying from it seems like forever. They are good about returns. Sizing is a problem. Sizes vary a lot, even within the same store. Color can be a problem, too, although if you can get a print catalogue it gives a better idea of the true color than you get on a computer screen.
The only wearable item I usually shop for in person is shoes, mainly because fit varies a lot with shoes. I like DSW because I can try on all the shoes I want without having to wait for an available clerk. Their variety is great.
I buy groceries in stores, only because I don't see much alternative at this point. I don't think any local stores offer delivery. I suppose I could buy staples on line and may investigate that before long.
As far as everything else, on line is my first choice. Books, CDs, DVDs, razor blades, refrigerator filters, Dog toys, some furniture, curtains, throw rugs, luggage, fancy bakery items for holidays, you name it. DH started buying camera equipment online in the 90s and has never looked back.