I discourage clients from angling their desks. Angling makes it almost impossible to link two work surfaces and creates sharp corners that impede movement and traffic flow. Invest in a chair that suits you right height, right depth, right feel. Include Ample Storage and Lighting Storage units are the next consideration. Figure out how much storage space you need and what form it will take.
Bookcases can house reference materials and stackable office supplies.
A closet can be used for storing additional office supplies and files. Add shelving to available wall space for filing units or other essentials. Place items where they are needed. Remember to keep decorative items out of your immediate workspace. When it comes to lighting, eyestrain makes for brain strain, which makes for less productive use of your time.