That's a big broad question so you may not get any replies!
A favourite here is the holy grail thread that covers most of the bases:
https://www.dpselfhelp.com/forum/index.php?/topic/20892-the-holy-grail-of-curing-dpdr/
A favourite here is the holy grail thread that covers most of the bases:
https://www.dpselfhelp.com/forum/index.php?/topic/20892-the-holy-grail-of-curing-dpdr/