Garant Nordic 24in Steel Snow Shovel
http://www.acehardware.com/product/index.jsp?productId=3994135
You won't bend this puppy no matter how hard you try.
I've killed every snow shovel I've ever owned, usually by breaking the handle or breaking the actual shovel bit.
I've had this for 2 winters now, and it hasn't even shown any signs of strain.
I can smash it into my driveway, and it'll break through or loosen up solid pack ice just fine.
I've also used spade shovels in the past, but they really don't work as well as my Garant.
I've tried a hammer, but usually anything big enough to really break up the ice will also break up the surface of the driveway.
Thus, Garant steel snow pusher = best possible way to remove ice.