Experienced only: What have you done with room correction?

I started with quitting trying to make a mid sized strange configured room work and moved the 2 channel system to a different larger room. Used calculators to determine how much acoustic treatment where to position, and where to best position speakers and sitting position. The treatement was for the time domain and positioning was for room nodes. I over compensated on room treatement and then removed treatment until it was just right. I used Room EQ Wizard for dialing in my active crossovers and use DSP for minor frequency correction.  

Best thing I ever did for room response was move my sub about 4’ BEHIND my listening position.  Suggested by Paul McGowan of PS Audio.

It really works!

I have used Audessey XT32, YPAO, MCACC, and Dirac. IME, Dirac is probably the best of the bunch.

There are two room correction programs, Audiolense and Acourate, that I have used for 2 channel music and they are next level. Mitch Barnett has written several articles on both of these programs on Audiophilestyle.com. Mitch is the proprietor of Accurate Sound and offers DSP room correction service for those that don’t want to spend the time learning the programs. He is extremely knowledgeable and patient. These programs reside on your laptop. One measures their listening room with a calibrated mic and develops convolution filters that are loaded into ROON or JRiver. The improvement is not subtle. Highly recommended.

I gave up and built a dedicated room to the specs of the U of Salford's School of Acoustics. I put record shelves and book shelves behind the speakers on the long wall and added 2 woofers. Magic!

I started updating my system 3 years ago.  After, i got all the components, one of the first things I bought was room panels.  I have two bass traps sitting behind the system, 6 first reflection panels, and 3 diffusers .  Room is 12 x 17x 8. Very good decision; I feel you can be changing out components trying to improve your sound when the next big bang for your buck is the room treatments.  My panels lowered listening fatigue, took to a much better place and improved sound stage.  I currently walk around the room and feel the sound doesn't change.  Many times you will have node cancellations whiere there is hardly any response at a given frequency range.  I do have one small bass peak in the left rear corner.  Bass is flat to 30Hz and good response in mid 20's.  There are several other things I have done to further refine the sound, but if I had done all that without treatment, I would be wondering why it doesn't sound right. 

PS  Eric has always been a proponent of room treatment and his posts/advise helped me make the decision to put up panels.  Thank you.