Did you mean stress management activities like meditation, or things like getting more organized or meeting with a therapist?

Meditation, breathing practice, and yoga yet help me. I know it can sound off-putting to some, but the research is very positive. There are different relaxation techniques that go by different names, depending on what appeals to you. I don't have high BP, but my dad does, which is managed with medication. For what it's worth, he was able to lower his dose of medication after practicing a few minutes a day of breathing practice + stretching. It's the deep, diaphragmatic breathing that is key because it helps calm your nervous system down, which can lower blood pressure in the moment and keep it lower over time because your brain/body starts to learn to practice that type of breathing on your own.

I have chronic pain, and it's not a magic wand, but 3-5 minutes of breath practice in the morning before I get out of bed immediately decreases my chronic pelvic pain (which is worst in the morning). If you're not familiar with meditation or diaphragmatic breathing, and it just seems too daunting, you could also try short, guided meditations. There are many apps, but I use Insight Timer. It's completely free, and there's a lot of good content with all different lengths of time and themes.

I prefer the simpler thing though...I just set a timer for nature sound and focus on listening to it and my breathing until the timer ends. It didn't feel so weird to me because before I had chronic pain, I listened to the audiobook "10% Happier" by Dan Harris. He's a journalist who was extremely skeptical of meditation, and went on a deep dive to learn more about it. This helped me appreciate it more because I like to know the "why" of why something helps or is worth doing. But when I don't feel motivated, sometimes it's better for me to just do a short guided meditation because I just follow the prompts. In the beginning, I just started with 1-2 minutes. I could usually convince myself to set a timer for a minute.

However, my sister hates sitting still, so she prefers mindfulness activities where she's moving, so more like hiking and gentle yoga, that kind of thing. It could be anything contemplative though has the same effects: Knitting/crafting, reading, walking in nature.