Given that poor posture seems, at least in my case, to be a lack of good habit, how did you address this part? The exercises are intentional and engage the mind

Given that poor posture seems, at least in my case, to be a lack of good habit, how did you address this part? The exercises are intentional and engage the mind actively. But bad posture is what I do when I'm not paying attention... this seems particularly important if the OP is correct in stating that exercise will improve already good posture and further degrade bad.