Every one-point perspective drawing is the same four moves. Once they're in your hands you can draw a corridor, a room, a city block — anything that faces you square-on.
The Four Moves
First, rule a horizon across the page at the eye level you want. Second, mark one vanishing point on it — somewhere near the middle to start. Third, draw the face you can see straight-on, exactly the way you'd draw it flat: a plain rectangle for the front of a box, with proper right angles and no trickery at all. Fourth, send lines from each corner of that face back to the vanishing point — these are your orthogonals, the receding edges — then "cap" the box with a smaller rectangle further along those lines. That smaller rectangle is the back of the box, and it's automatically the right size, because the orthogonals shrink it for you.
A Worked One, Slowly
Picture a present sitting on a table in front of you. The side facing you is just a square — draw it flat, easy. Now from its four corners, lightly rule four lines back to the vanishing point. Decide how deep the present is and draw a second, smaller square sitting on those four lines. Join it up, rub out the bits you couldn't really see, and you've got a believable 3D box. The clever part is that you never guessed the back corners — the lines to the vanishing point placed them perfectly.
Keep the Front Face Honest
The one thing people rush is the front face. In one-point perspective the face that's square-on to you stays completely flat — true horizontals, true verticals, real right angles. Only the edges that travel away from you bend toward the vanishing point. Get the front face clean and the rest almost draws itself.