How tall do you like your images?

@erik_squires Out of those, I haven't done ceiling but I did treat the others mentioned. Thankfully I have vaulted ceilings which helps but my WAF of existing treatment is definitely near or at the limits!

@christianb5s4

Depending on how your speakers are set up, it may also help to put standing panels between the speakers and the TV.

I took delivery of new speakers yesterday, and this thread popped right into my mind as one of the primary changes I noticed.  Interesting so far!