Pry off the baseboards with a small pry bar.
Measure from the end of a board to 1 inch and mark it on the side with a pencil.
Set the board flat on the platform of a miter saw set at zero degrees for a straight vertical cut. Align the pencil mark with the opening at the center of the saw’s platform.
Engage the saw’s blade, lower the handle and cut the board at the mark. Repeat, slicing off 1-inch-thick tiles from each board until you have enough to cover the floor. If the boards are too large to cut with a miter saw, use a table or circular saw.
Lightly sand off splintering around each tile by hand with medium-grit sandpaper.
Scoop up urethane-based flooring adhesive on the edge of a notched trowel and spread it on a small area of the floor. Some urethane-based adhesives have a short working or open time before they set. Spread only enough to cover an area that you can reach without repositioning yourself.
Press the end-cut wood tiles flat against the adhesive in the pattern of your choice, butting them together tightly. There is no need for tile spacers between the tiles.
Let the floor dry as long as the adhesive manufacturer recommends, or at least 24 hours. Do not permit foot traffic until the adhesive is dry.