what to do about those blank walls

Ever since we had some work done in our kitchen and it was repainted, I've been hesitant to hang anything on the walls. I didn't want to hang what we had there before, and I also didn't want to hang "just anything" for the sake of filling up blank wall space. I had shopped at a few places and brought wall art home with me, only to find it didn't look as good as I had hoped. I didn't find anything I was looking for online either.

One day, I was in the basement doing laundry, and was looking around at some of my home decor stash. I brought up this white frame and yellow tray, affixed it to the kitchen wall with Command strips, and stood back...

 I liked it!

Here's what the kitchen wall looks like in its entirety. You can see I still need something on the other side of the china cabinet. But here's the thing: I think I want to get rid of the china cabinet, the cart and stool and instead put a cube storage unit on that wall. I could then fill the cubes with cookbooks, large serving dishes, and small kitchen appliances that I have stored in the basement. But I don't think Brian's too keen on the idea of getting rid of the china cabinet. It has sentimental value. It was the first good piece of furniture that we bought in our early married days. We bought it at a beautiful vintage furniture store that is now out of business. There's nowhere else in the house to put it.

Here's what I had in mind: the IKEA Kallax cubes - turned on its side, of course. We could even put legs on the bottom of it to raise it up a bit. 

When I was in the basement rummaging around, I also brought up these two canvas pieces and again, used Command strips to hang them on an empty section of the living room wall. Command strips are a lifesaver in my house because I change things around all the time! Not to mention, no nail holes to deal with.

Where do you find unique ideas or art for blank walls?