Borders 33% off any one item, online use BSL7108N or click here for an in-store coupon.
Old Navy has reduced inventory to 75% off on sale stuff.
Amazon has 55% off Blu-ray movies.
Amazon also has a DVD trade-in program. You go through their list of DVDs to see if you have any of the movies listed and what Amazon is willing to pay you for them. You then print out the shipping label that Amazon provides and ship them your DVDs. They will send you (or deposit into paypal) an Amazon gift card for the value of the movies. From now until June 30, 2010 they will give you an extra $10 credit for every $50 in DVD trade-ins, to be used towards the purchase of a Blu-ray movie.
Although it seems like a worthwhile program for older movies, the price given on some the newer movies is ridiculously low (like $5.50 for Up). So make sure you search and get a good price.