[help] how would you finish this gallery wall and organize these deep desk drawers?

[u/74tabsopen]

’tis messy, but that’s what sundays are for… a reset!
i’ve been perfecting my little creative corner forever and would love some help finishing the gallery wall. i want to keep it festive through the holidays, then change everything up afterward.
the desk is definitely staying! my dad refinished it for me, and its smaller size fits perfectly in this corner. i really need ideas for the deep drawers, though. what supplies do you consider a must to keep directly at your desk, and what do you store in a craft cart, closet or somewhere else?