I used to be a loyal Limited shopper in my 20s and still love their looks, but sadly, their pants/skirts don't accommodate my softer 30-something childbearin' hips. However, it's an excellent source for colorful blazers and cute tops. Around Christmas, Limited always carries the cutest, coziest big sweaters, if that's your thing. They run sales all the time, so I'd hesitate to buy anything full price unless you can't live without it.
Express: Worth trying out the Editor/Columnist pants for work and the button-down tops. They also carry a good selection of tees and tanks in tons of seasonal colors, but I can't speak to the quality because I haven't bought basics there in years. I'm not a huge Express fan (even at 25, I felt too old to enter!), but there are a few hidden gems every season. I know a lot of women who wear Express jeans, too.
Loft: Another place that carries machine washable work pants in a variety of fits. I've found some good, basic skirts here, too. I've been disappointed with the quality of Loft's knitwear, but I like Loft for finding trendier tops to mix in with my basics. The downside is that Loft carries a whole lot of polyester, so buy on sale. I do love that Loft is very good about bringing in new seasonal colors. If you aren't a sucker for colors like I am, this might not be a draw. My sister swears by Loft jeans.