This was posted on an online support group for people with Anhedonia:
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HOW I HEALED MY ANHEDONIA WITHIN 4 MONTHS:
Rejoice! You, like everyone else, are an amazing self-healer. These steps are not in specific order. I am listing what I was doing, and how I lived, to get to the point where I healed from this condition in only 4 months. I'd you want to skim through this, the most important points are 1, 2, 3, 5, 8.
- STOP DRUGS. STOP ALCOHOL. I quit marijuana completely. I never took any more antidepressant or ADHD medication. I never drank any alcohol anymore.
- COGNITIVE REFRAME TECHNIQUE. This was very, very effective for me. It was after doing this technique for 3 days straight, paired with POINT 3 below, that I finally found myself with fast healing from Anhedonia. Here is the technique:
- Sit down comfortably.
- Close your eyes, and get into a meditative state. Do this by taking deep breaths, and focusing on your breath. We want to enter your subconscious here.
- Once in this state, I want you to visualize the first moment that you realized that you had Anhedonia. (OR, the moment that you believe caused your Anhedonia. Like, a trauma.). Visualize it clearly, as if you're there now. The place you were in, what you saw, what you heard. And once you're in this place, I want you to FEEL the pain, the sadness, the anxiety. All of the emotions that you felt when you realized you were struck by Anhedonia. Oh, god, it was awful!
- Amplify the feeling. Amplify, amplify! Cry if you need to, for damn sake. But never open your eyes. Keep them closed. You're in that moment.
- When you've felt enough of that pain...change the scene in your mind. Quickly change the colour of the room to your favourite colour. Change the scent to your favourite scent. Add your favourite pet. Maybe hold a cup of tea if you love tea as much as I do. Anything that would normally have made you happy before Anhedonia, add that into the scene.
- Now, you can stop crying. All your favorite stuff is here! It's great. It's calm now. Try to feel joy if you can. If not, at least know that you're okay now. No more hurt.
- Say to yourself in your mind, "I can feel pleasure now." or "I can feel joy now". Whatever positive thing you need to happen. Say it as many times as you need.
- Open your eyes. You're back to reality, and you just finished changing a life-shattering moment into a moment of peace, full of all your favourite things.

As I've said before, I did this 3 (or 4??) days in a row. It's best done in morning after you wake up, or at night before you sleep.
This technique might help you too, or it may not. It all depends on what is happening with you. This helps mostly the people who have subconscious blocks or trauma that causes or worsens their Anhedonia.
3) NEUROTRANSMITTER AUDIO. You can find many neurotransmitter frequency audios on YouTube. Find the one that works for you, and listen to it dally, preferably while falling asleep. I realized that my anhedonia was cured the moment I put on a very powerful one, about one week after I did the reframe technique in POINT 2. I felt emotional pleasure for the first time in 4 months while listening to a powerful audio.
4) SUPPLEMENTS MAY HELP, but I can't confirm if they did help me or not! The most powerful supplement I took was called MUCUNA PURIENS. I took it in powder form for a week. Mucuna transforms into L-Dopa, which turns into dopamine. It easily crosses the blood-brain barrier. Be careful with Mucuna. Don't take too much, too long. But I noticed that when I took mucuna, it gave me a boost, where I could strain even just a LITTLE fizzle of joy in me again sometime during the day. And that's great! That little fizzle every day will help you train that joy part of your brain again. I ALSO TOOK OMEGA-3, ZINC, VITAMIN D, B VITAMIN COMPLEX, AND PROBIOTICS. Every single day.
5) EXERCISE! Holy crap, guys. This is a big one!! Exercise, especially cardio, really helped me heal. I went to the gym every second day to do cardio for 30 minutes straight. Exercise not only helps fight depression, but it encourages natural dopamine and serotonin production.
6) DAILY TEA. I mean, I don't know if this contributed to my healing or not, but it doesn't hurt. During the month that I finally healed, I had been drinking caffeinated tea every morning. Oolong, green, and white tea is what I drank. I think I drank more green tea than anything else. Green tea is packed with l-theanine, is a natural stimulant, and is really good for the brain.
7) EAT WELL. The gut produces a lot of your serotonin. Make sure you are eating foods that don't irritate your digestive system too much. Steer clear of fried foods, and too much refined sugar. You gotta give your body what it needs to heal.
8) STOP THINKING ABOUT YOUR ANHEDONIA. Focus on something else. If you constantly obsess over a health problem, it won't get better. Let it go. Let it flow. Because you KNOW it will get better and go away someday. No need to panic or obsess now, because it's only temporary.

Don't feed your anhedonia. Don't build walls that say, "I can't do ___ because I have anhedonia". Act as if your anhedonia ain't even there! It doesn't own you. Live on. Just live.
9) EVERY DAY, LIST THINGS THAT USED TO GIVE YOU JOY. This is something I learned from a life coach. Take like 10 minutes out of your day to just write down things you used to love (or things that would make you happy if you didn't have anhedonia), and then try to picture them in your mind. A warm cup of tea, the dewey grass on a summer morning, a cute happy doggo with its tongue out.

Well, that's it!
I found that it may take time, but anhedonia can very well heal. Never lose hope. I clung to hope throughout my journey. It was really tough at times, but don't fret. You've got this. Dedicate and commit to healing.
I wish you well. I wish you healing. I hope that I could be of help! ~ Peter
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I'm a huge proponent of meditation.
I wish you all the best, Ian.
Frank