People, there are some rules to decorating. I know, bummer, I hate rules too. There are lots actually but for now I'm going to focus on just two. Trust me though if you do these two things your space will instantly be elevated. Bonus: First one costs nothing.
Hang your art at 58" on center. Not the center of your wall, not the center of the space between the top of your couch back and the ceiling, and definitely not right next to the ceiling. If your ceilings are 8' or 12', hang that gallery wall 58" on center. Are you into big metal letters and sayings, à la Joanna Gaines? Hang "blessed" at 58" on center. Are you 6'7", 4'7", somewhere in between? No matter, hang your family photography at 58" on center. Are you picking up what I'm putting down? Get out a tape, take it 58" up the wall, mark it, then take your big ass clock and center it on that mark. This is how art galleries and museums do it, 58" on center, they are professionals. When in doubt, do what the pros do. This will put your pretties at an optimal height for EVERYONE to enjoy. It will feel weird at first, but as your decorator I advise you to take it all down and put it all back up... 58" on center.
I realize that sounded a little rant-y, but there was a reason. I think I read somewhere one time (?) that if you repeat something seven times people will remember it. There are seven "58" on center" in the above paragraph. I'm just helping you commit it to memory. I don't have a cute graphic for this because well, I can't draw or computer draw, even. Google or pinterest search this and the following suggestion, you will find all sorts of graphics for further guidance.
Can ya'll handle one more rule?
This one is harder, dependent on your ceiling height. Your curtains should go from either, damn near your ceiling (like, within an inch, MAYBE 2) or the bottom of your crown moulding, alllll the way down to the floor. I know that sucks. You just went from a 63" Target curtain, to a 96" from West Elm, in the blink of an eye and that's if you are lucky. I am not saying I am "unlucky" to live in a house with tall ceilings! It IS however pretty much a pain to have all your curtains custom made, as nowhere has a standard 133" panel. It's a pain to a point that I have personally broken this rule in all but one room. I know, for shame! I will however share this tidbit, the room in which I followed the rule (36 yards of fabric later) has been transformed by the curtains. My suggestion to you is, go as big and as long as you can and do it one room at a time. Consider roman shades or even bamboo blinds, in lieu of curtains. Also, shop the sales! That's MY rule for everything though.