The Cube

I started by getting the movement working blocked out to try and get the best movement possible without having to worry about tilting or anything major.

Here is the cube moving in forward then slowing down and reversing the other way.

This looks fine just like this however adding more life to the animation can really improve something like this so i used the graph editor to make the movement more fluid and then added a tilt to make the movement in the oversite direction seem more fluid and punchy.

once I had the tilt done I added a few bounces to the end to make the cube leveling out seem more life like and realistic.

Finally I took the full animation and added a camera to the scene to have a better camera angle to display the animation in its best form.