Take everything off the shelf and group it by job: glasses, tools, ice gear, storage, mixers, and atmosphere. Throw away expired mixers. Move duplicates out of the main zone. Keep bottles you serve, not bottles you feel guilty about owning. If a tool solves no regular problem, store it elsewhere or give it away. A better bar often appears after subtraction, not shopping.
The Six / Editing
How to Edit Down an Overcrowded Home Bar
The fastest way to improve a crowded bar is to remove duplicates, expired mixers, novelty tools, and bottles you never serve.