My clear top two are Nordstrom and Anthropologie. With the latter, I stalk items online and buy in-store (if they don't have it, shipping for in-store POS orders is free).

I also like to shop Zappos and Amazon for shoes (in addition to Nordie's), but my size is hard to find and my feet are fussy so I've learned to be wide-ranging in the shoe search. I keep up with Everlane new releases although often their aesthetic is too minimal for me and return shipping costs turn me off from trying items that may not fit. I have a straight upper half, so I can order tops from them knowing that they'll fit predictably based on the model shot.

I also try to shop fast fashion/mall stores like Express, Banana Republic, Gap, Old Navy, H&M... strangely not Zara, which seems overpriced for the inconsistent quality (and lack of petite sizes). But as my quality and fabrication meters have gotten pickier, I've bought less from those stores.

Canada
Try to use local boutiques whenever possible, than try the following
The Bay/Olsen
Aritzia
Melanie-Lynn
Banana Republic
R W & Co

Miss MEXX so much was my number one place to go.

USA:
nordstrom
Gap
BR
macy's
WHBM
Talbot's occasionally
Chico's occasionally
Clarks for shoes sometimes

Canada:

Winners/Marshall's
Marks Work Warehouse
Sears
Land's End
Towne Shoes

Oh, I forgot Barneys... And that I'm a poor student now, so I'm not actually buying...

Fun topic!

In Australia:
Jacqui E - *waves to Anne*
Myer - Shoes and their brand Basque for workwear
Metalicus
Target
Jag for weekend wear

Nordstrom-over the past couple years I do the majority of shopping for me, my sweet and gifts here.

Lord & Taylor- because it's my Mom's favorite so I'm usually in store a lot.

Banana Republic-I just purchased a few things after a long hiatus from them.

Zappos

Oops, I forgot Target. Probably underpinnings and pjs mostly but I do like their knit tees.

Ladyjane mentioned missing stores that are no longer around, so I will say that I miss Harold (Harold's?) and Janeville. Also Casual Corner, although that was a while ago...

In case anyone was wondering... current leaders are...

Nordstrom
Amazon
Gap
BR
Zappos

Runners up are...

Talbots
local boutiques
Anthropologie
Loft
Kohls

In no particular order:
- my closet
- fabric shops
- vintage shops
- a local atelier called BYBROWN
- Uniqlo

Shopbop ( 65%)
eBay
Uniqlo
Amazon
Kohls and Nordstrom are tied in 5th place

In Canada and almost exclusively online: ( I do occasionally check out sizing in the b&m stores)
Gap
Zara
BR
Ariztia
Joe Fresh

I also shop these US retailers and send to a US mailbox
Nordstrom
Amazon
Zappos
J Crew
Loft

Nordstrom
Nordstrom Rack
J Crew
Uniqlo
Everlane