PITA and I spent all afternoon clearing out expired inserts.  March 31 was a big expiration date; I have a CouponTom widget on the right sidebar that magically tells you if there’s any coupons still extant.  Just click the month, then the date on the next screen.  You’ll see all the inserts and they’ll either be red (toss) or green (keep).  If they’re still good, there will be a notation as to when the last coupon expires.  We filled up a couple of recycling totes already – that’s the downside to getting lots of inserts you know!