I buy a lot of 2nd hand brand name clothes. I only pick top brands and clothes in perfect condition. I shop tons of rummage sales and have found new looking clothing for 1.00 a piece. We also have a few childrens consignment places here and I stop in often to pick up items.
Brand new I shop sales at Crazy 8, Gymboree (amazing deals to be found there if you keep looking), Old Navy & The Children's Place. Parenting magazine gives out a Crazy 8 and Gymboree 20% off coupon almost every magazine.
Do you have an outlet mall by you? I always go there too, especially when they have their sidewalk or big sales.
Kohls is hit or miss and the girls clothes can be a bit racey. I don't find them to be any cheaper than anywhere else. You need the Kohls CC to make the savings worth your while.
Don't forget to browse Craigslist.