Great ideas already! We used a pampered chef tool turnaround turnstile for all of the markers, crayons, pencils, glue sticks, rulers, etc. Each of our dc has his own turnstile. They are easy to move from place to place and go back in the cupboard when done. I would have cupboard doors to cover up shelving housing school things if possible. It just looks neater and more appealing to me then following down books or cubes!

Adequate lighting is really important, as is a large enough surface for spreading out work (especially for middle school and high school students). A CD player, earbuds, computer, etc. are nice as well. I'd also sneak in a Keurig coffeemaker for me!

I like my armoire with doors for my stuff, and I have a grading scale, timers, white dry erase boards (4 handheld ones), dry erase markers and erasers, and a charger for my phone (so I can snap pics as we go for the HOD weekly check-in).

I'd get a globe. You use it every year, usually for history and geography and science. It just gives a better visual of the earth (how it rotates, revolves, its curved surface, topographical features are upraised/indented, etc.). Have fun setting up your space! HTH!
In Christ,
Julie