The easiest method for making a home office feel cozy is with the lighting. Change the bulbs out for ones that emit a warm yellow glow. You don’t want them too warm where they look obviously yellow. Aim for just slightly warmer than daylight light. This makes the space feel more welcoming and less like an office. Add home touches to the decor, also. This could include a plant, candle, throw pillow, or plush rug.