The trick is this: grab a paper and a pen, and write down your thoughts, the feelings they cause, and the actions you do after. Just write down where you at now, and how you feel. Maybe you are reading an article about DP now, and that makes you hopeful, and you start doing X. Write down that. And when your mood changes (probably will), write down again. Like, the second line would be: I still experience DP, I feel frustrated, and I started to do Y. Then, when you get angry about it, write down that. Third line: my whole life is fucked because of DP, I feel very angry, I don't deserve this, and that made me do Z. Then, let's say it makes you feel hopeless, write down that too.
The most important thing is, that DOESN'T MATTER how you feel, write it down. Thought ---> Feeling ---> Action. Doesn't take much energy.
If you do this, you can realize "circles" you are doing, which you are not aware of. Because that is why you experience chronic DP, because you get lost about what and why you feel, and how these feelings and moods create the next.
I suggest you to start right now.
This was one of my "circles", which I realized and helped me:
1.) Something makes me feel happy, or makes me feel realize that everything is cool, and inspires me to do something I love.
I realize something great ----> makes me feel great
2.) Because I feel great, I want to start it. ---> inspired
3.) When I get inspired, an old reflex kicks in: when I was living with my psychopath father, feeling happy was not an option, because he punished me or said or did or lied something to ruin my mood, so the only way to feel happy was to imagine some great scene in my head. To daydream. ----> so, when I get inspired, I start to daydream, instead of doing the inspired action
4.) I start to daydream, start to imagine situations (which could even happen in real life), and start to get emotional and sensitive. I daydream even more, and I "lose myself" totally. Like I am in my head and not living life. ----> get distracted
5.) This daydreaming goes on and on, and the whole stuff does not let the realization I had at 1.) "lock in". I can't accept that realization because the "energy" goes into daydreaming.
6.) At some point, I lose the momentum, and "punish" myself somehow.
And this whole shit just ruptures me. I lose track and I am at "nowhere" again.
Hope this helps.