What do you put under your stabilizers and trailer tongue?

cbshoestring wrote:
.... but I found THIS to be an interesting way to level (side to side) and think I will purchase one as soon as the wife says I am allowed to. :W Which should free up a handful of blocks.

hmmm...that does look interesting! I haven't needed more than 4 inches anywhere yet, so this might be really nice to have! Anyone know if it works?