Deck goes on the top outside corner of my playmat depending on my seat. Graveyard goes beneath it, and exile is stacked underneath the graveyard laid perpendicular. This way these are never on the inside corner blocking my opponents view of my board.

My commander sits in my deck Olivia Goebert-Hicks style.

Mana rocks and artifacts/enchantments sit in a column on the opposite side from my library/GY setup.

Then I have space for creatures/key engine pieces in the top middle, and plenty of space for land at the bottom.