I'm only here to try spread a little bit of what I think is useful in dealing with this disorder. I'm making myself write this, because in some way I feel like i'm just like all of you. I believe that there is some sort of underlying likeness when it comes to people with this disorder. I've had it for 6 years, and I still experience it, but I find myself out of it more often.
My best attempt at a short piece of advice is this: Instead of trying to escape it, don't try. AKA, instead of trying to "maintain" your sanity, or fix your DP, don't. Paradoxically, not trying to escape it might get rid of it.
DP is the illusion. Life is not. DP isn't real. Life is. .
P.S, The artist Eyedea (R.EYE.P), wrote a 2-part song about what I believe is this disorder. Some may disagree. (The dive part 1 and 2)