Mostly Target, Dick's Sporting Goods, etc. I haven't delved into LLL territory yet because I fear there will be no going back and I'll have yet another expensive habit. lol.
Target carries brands like Champion and Hanes, which are decent but not expensive. I love Hanes' fleece yoga-style pants when it's cold. I'm wearing some right now. Most of my camis are from Target and Old Navy - I buy a few each year. Cardigans are either cotton or cashmere, depending on the season. Cotton ones are from anywhere that has cute ones, cashmere are mostly from Garnet Hill (on sale).
My favorite yoga pants are actually from Lands End.
My coordinated stuff I bought from Old Navy and Target on a spree. The ON stuff all kind of matches itself, and so does the Target stuff. Target's Gilligan O'Malley and Merona stuff is often cute and comfortable for true pajama-type lounge wear. Little touches like ultra soft fabric and a little bit of lace make it pretty and feminine without being too va-va-voom to wear around the house.
Did I just type "va-va-voom"? Am I in an Archie comic?