Before you acquire more objects, consider going through the
Kitchen • Bedroom • Bathroom • Office • Clothing • Car • Cleaning • Hobbies • Camping • Kids/Babies • Lighting • Pets • Misc
(I'll end up saying more at some point, but know that I think there's good reason to think that these sort of creative outlets are much more important than we might think)
Lighting makes such a difference in how you feel in your space. It's really hard to notice unless you run experiments, so maybe just take my word for it and start optimizing?