Okay, as promised here is another video (bit longer then I wanted it to be) that covers a basic polygon modeling approach to modeling the sandal from the last NURBs based tutorial.
There are many ways to approach this. The box modeling method is covered someplace on you tube, as nitro mentioned. So I will just briefly touch on it here and leave it to you to find the full version.
Instead, I will demonstrate another method, by first using create polygon and edge extrusion to create the basic outline of the foot as a planar polygonal surface.. Then copy this and shape it to form the top and bottom the sandal, and then use bridge, fill hole, extrude, insert edge loop, and beveling to create the side of the sandal and tighten up the edges for smoothing.
Hopefully this will demonstrate some helpful basic poly modeling techniques.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675