Pro Episode 17 is a good resource.  Also courtesy of Roop, whenever you stand you should brace 20% in the torso, and 20% in the glutes also. Train yourself to brace in both places unconsciously all the time. The bracing in the glutes will help pull the pelvis into neutral away from your excessive anterior tilt, which helps rein in your sway-ed lumbar spine.  

I took the Gokhale method class this last August. I credit the fix of my personal posture to this class. I thought it was excellent for about 90% of it and there was 10% I would change.  I would highly recommend the class, taking in mind that there could be a few little details which may not agree with this community or the general physical therapy community.  It is also very effective for sedentary folks who are not fitness people.  So if you wanted to fix your mother or father’s posture, you should send them there for sure and not to something like Foundation which might be too much movement for them.

There is something called RNT or Reactive Neuromuscular Training which I learned about when I certified for the Functional Movement Screen or FMS.  A typical RNT protocol is to cause facilitation of the error with some tool like a band, and then you resist the error to imprint the proper neuromuscular result, which will hopefully stay without the tool later.