Here are some things I've tried. All give a net positive to me being less anxious.

- Rejection therapy (https://en.wikipedia.org/wiki/Rejection_Therapy): get rejected by another person at least once per day. Great practice.

- Gardening. Shut off the computer and leave the phone at home. Plan to have several hours doing something you enjoy (for me that is gardening, hikes, beach, ocean) with no screens

- Exercise. Even if you don't do it at all, start like a child. Choose an activity you can imagine yourself realistically doing for the next few years. Bouldering, Biking, Power Lifting, Crossfit, Running, Yoga, Calisthenics.

- Treat your body and mind like a temple. As you consume something (food, digital) ask yourself: 'is this serving me?'. If it isn't or gives pause, explore alternatives. One of many reasons I don't drink anymore.

- Toastmasters (https://www.toastmasters.org/) or Improv club. I had a few years where I noticed my speaking skills plummeted. Toastmasters was recommended and I loved the playful club.

- Lunchclub (https://lunchclub.com/). Casual way to chat with other people in tech and other industries. Lots of people there are also working on social skills