Guy's:
I've tried a few things in the past, what I like is using a 2x8 about 5' long, then lagging a 3' on top of it, then a 1 1/2' on top of that. Put them at the one end and it looks like a step. You don't have to have all your tires raised to level, I pull forward, look in the mirror, when the ball is in the middle I stop. Usually it's just my front tire that is raised and the back one is still in the grass. Once in a while the rear tire is starting up on the board, but that's it. Looks like this kind of.
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Granted it's a little heavy, but you only have to fool with one thing, not many things.