I've found these photos from Elle Interior very helpful as I'm helping my step-sister style her new apartment. She has A LOT of stuff, so we've been very mindful when layering her objects without letting the space look too cluttered. I actually prefer spaces with a little more to look at (the good kind of clutter.) We do LIVE in our homes after all! So it's okay to have our purses out and artwork taped to the walls! But as you can see in the room below, keeping a simple overall color theme helps keep the room unified.