Dissassociation was my worst symptom. I still deal with it on and off (I figured that I am just prone to it and I believe I had spells of it pre-LTC). The best way to deal with it is learning how to cope with it. I know how terrible it can feel and how scary it is but once you get over your fear of it, it really goes away and is quite manageable even when a spell pops up. CBT was instrumental in me learning how to cope with my DP/DR. Once I let my guard down, I slowly regained control over my life and consciousness. Once you learn to ignore it properly, it will go away.
I unknowingly gave myself a etiz habit last month after popping them for fun and not realizing that they would produce physical withdrawals. Needless to say, once I realized I was doing and that I was playing with fire, I quit cold turkey. I did not take very much or them for very long but I did get a few days of rebound anxiety and insomnia -which in turn triggered symptoms IDENTICAL to my LTC. As I had been down this road before with DP/DR, I knew exactly how to deal with it. After two days, I was fine. I am sure if these symptoms were new, I would go online and FREAK myself out and be stuck with a longer term episode of DP/DR.
It is all about your approach to dealing with the symptoms. I used to be a hypochondriac (which I am convinced lead directly to my LTC being so nasty). Anxiety is a real motherfucker and will convince you of things that do not exist.
I had to take a step back and convince myself that I was acting and thinking completely irrationally. I just waited it out wiht the help of CBT. Now I am fine and have the tools to overcome any anxiety that creeps up in my life from time to time.
Also, for those worried about being stuck in a disassociative state their entire lives (I sure was), my therapist said if your level of disassociation ebbs and flows throughout the day or week or month - then it will not be permanent, it is just a symptom of stress and anxiety.