The most important thing you can do for a productive workspace is make it feel like your own. Hang up your personal photos, put up your favorite quotes, and decorate however makes you feel comfortable and inspired. This will help you associate the space with positive feelings of productivity and creativity, rather than feeling like you're stuck in a boring office cube.
One of the best ways to get motivated for work is to have a tidy and organized space. Dedicate specific drawers or shelves to holding only your work-related items, so everything is easy to find and within reach when you need it. Having an uncluttered desk will help minimize distractions and allow you to focus on the task at hand.
A sunny workspace can do wonders for your mood and energy level! If possible, try to position yourself near a window so that you can take advantage of natural light during the day. If extra sunlight isn't an option where you work, consider using a lamp with a warm yellow light bulb instead – this has been shown to be more conducive to creativity than harsh fluorescent lighting.