Work the walls with shelved cabinets that round up books, binders and photo albums.
Make way for technology. Will it be a stationary monitor and PCU or a laptop used in multiple places? How will you connect to power and the web?
Consider everyone and every way to use the space: homework, bill-paying, online shopping, work brought home. This may affect your choice of seating, worksurface height and storage.
Make an office at home anywhere by choosing styles and finishes that complement your décor.
Don't discount diplay: the photos and artwork that inspire you... and the reminder tools (tack board, marker board) that keep you on-task.
Warehouse your waste basket, recycle box and paper shredder within easy reach.
Augment any natural light with tasklighting for your primary work area.