This video is EXCELLENT and brief. Apologies if it's been posted in the past, but it may help some new moms with car seat issues:

http://www.cars.com/go/video/player.jsp?aff=mother&mp=t&mediafile=motherproof/Carseat_Mistakes.flv&ttl=Top%203%20Mistakes%20Parents%20Make%20Installing%20Carseats&cptn=MotherProof.com%92s%20Kristin%20Varela%20talks%20to%20the%20Car%20Seat%20Guy%20about%20t