Clean the wood floor well, using either a standard broom or a vacuum designed to work on hard floors.
Mop the floor with a nonabrasive floor cleaner or vinegar and water to completely remove any remaining dirt. Wipe the floor dry with a soft towel or cloth.
Check the floor for any rough patches, and use 200-grit sandpaper to smooth out any rough areas. Wipe the area clean with a damp cloth when you're finished to remove any dust or debris.
Pour the wood oil into a bowl or bucket, and use a clean, soft cloth to apply a thin, even layer of the oil to the floor. Work in circular motions, and overlap the circles as you move across the floor for even results. Do not over-saturate the wood with the oil.
Let the wood floor dry thoroughly before walking on or using it for any activity. Allow 24 hours to pass, and apply a second coat of oil if desired.