I wrapped Cooper as a newborn and then only did it for a few weeks. But for the last month I have started wrapping him again for day sleeps only. It really helps him to sleep longer than 1 hour. I too was doing the traditionally way of wrapping. But for the last couple of days he has been getting his arms out. So I devised a new technique. I will post pics and a rundown. Hope it helps.

Step 1
Lie bub in middle of wrap
http://i60.photobucket.com/albums/h2/Fee78/DSCN4420.jpg

Step 2
Take one side of wrap and put it over their arm but under their back. You can make it as tight as you like (so their arm is firmly straight against their body).
http://i60.photobucket.com/albums/h2/Fee78/DSCN4421.jpg

Step 3
Do the same with the other side.
http://i60.photobucket.com/albums/h2/Fee78/DSCN4422.jpg

Step 4
Grab botton edge of wrap and bring it up to bub's chin.
http://i60.photobucket.com/albums/h2/Fee78/DSCN4423.jpg

Step 5
Wrap each side of leftover material underneath bub.
http://i60.photobucket.com/albums/h2/Fee78/DSCN4424.jpg