Below is a photo of the furnace I refer to in the corner of my room. With something this dominant you can see why it needs to be included.
Adjustable shelving is great because as your needs change you can customize the shelf height to accommodate whatever they hold, plus they are relatively inexpensive. Everything can be more visible as well. If you are one that prefers supplies hidden more out of sight, consider cabinetry or containers on the shelves to conceal your items.
Once you feel you have the major pieces in place, mentally walk through your processes and determine if these things are placed logically and conveniently. Don't be as concerned with the decor or ambiance of the room yet. That comes later. Right now pay particular attention to location of outlets, pathways, windows, lighting and doorways. Look for things that may become annoyances as you are working such as a door opening and closing behind you, outlets you can't reach, or others having to walk through your primary work area as they go from one room to another. Really think through this since this would be the easiest time to rearrange your pieces. As an example, I originally had a deeper table in front of the window. I quickly realized that reaching the window to open and close it took getting a stool to climb on just so I could reach the window. Moving my counter to that area instead worked out perfectly.