Target is having a sale that they're touting as "the biggest LEGO sale ever!" I've seen bigger, but I won't complain about a sale. It includes up to 20% off Star Wars, City, Hero Factory, and Duplo.
9492 TIE Fighter on sale for $35.20, down from their usual $44.99. I've always held back on this one with its initial $54.99 MSRP, but almost 40% off that, it's a great deal. It even ships free! How slick is that? A lot of other sets ship free, though some require you to reach a $50 spending threshold.
Red card members get an additional 5%. According to this thread on Brickset, there is also a AAA discount as well as a $5-off-$50/ Free shipping discount from RetailMeNot.com.