Draw Two-Point Perspective

In perspective drawing, every set of parallel lines has its own vanishing point. When viewing things in two-point perspective, we arrange them (or ourselves) so that we are looking at one corner, with two sets of parallel lines (the horizontals on the front and one side) are moving away from us, at an angle to a vanishing point. The remaining set of parallel lines, the verticals, are still straight up-and-down.

It sounds confusing written out like that, but you know how it looks, and if you follow the steps, you'll find it is quite simple to construct.