I often need an iPad support, and never found it. So, I built one. And it's more stable than my 50$ support!
Step 1: Only One Step!
Take a little cardboard box, and cut the right shape. Be carefull: the iPad should not be too vertical (if you don't want a broken screen...). It's light, you can adjust the screen angle, and when it's borken, you recycle it ;-)