I subscribe to http://www.bargainist.com. They send out the best deals of the day and highlight good coupons. I am a big fan of RetailMeNot and always check them before I buy something online. I also try to go through Ebates to see if they have cashback.
The best sites for deals:
http://www.6pm.com (great deals on shoes!)
http://www.thecompanystore.com (this is more home and kids but their seasonal sales are crazy good usually)
I also make sure to check in regularly in the sale sections of my favorite online haunts. Buying classics out of season is always a good bet.
I also find that a lot of designers are now designing lines for big box stores like Target, Walmart, Kohls, and JCPenneys. While I woudn’t have given these stores a second glance in the past, I try to keep tabs on what the designers are doing for the stores with their new lines each season. Recently, Norma Kamali did a line for Walmart and has a great black dress for $20!
Thanks!
Mama Threads (http://www.mamathreads.com)