You didn't lost anything, you choose not to have those. It's quite a difference and it all depends on your perspective versus the perspective imposed to you by external references. The idea that you lost is an external imposition because probably those lost opportunities would grant you more money or more this or more that. What is not told you is what you'd have to pay to get there, which, most likely would be your health, either mental and/or physical. You choose not to follow those opportunities because there was something wrong when the choice was offered to you. Find that wrong and own it. Maybe it was unsupported fear you had about something, maybe it was someone you felt uncomfortable with. When I was a kid, I was forced to learn classical piano because my grandmother was a teacher. Nobody asked me if I liked it or wanted it. I felt disposed in that music school like a toy in a box. It obviously didn't go well for me, but my sister endured it all. She did the full piano course and has an excellent musical understanding (and ear) that I never got because i went the self-thought way. Some times I regret my choice, others, I do not, but I couldn't have done it any other way. I'd be hurting myself inside. DO NOT REGRET your past choices, own them. I've been practicing Kung Fu since 1994 and I've also studied Yoga for short period of time (about 2 to 3 years) around 2000's and understood a lot of how the body works and reacts to whatever hits it. These 2 activities taught me that there's only one way to conscientiously slow the heart beat: breathing exercises. Breathing is the hardest thing we do when we are born, it's also the first and the last thing we do in our life-time. It's also, unfortunately, one of the most disregarded actions of our body. There are several breathing exercises with different purposes, but they all improve the oxygen level in our blood and, therefore, will better our clarity on our own thoughts. It's the reason why when someone is stressed/confused is told to breath deeply and calmly, because it will increase the oxygen level in the blood AND will decrease the hart beat rate (eventually blood pressure as well). When in stress, breathe. ::: A full breathing cycle is composed by breathing IN and breathing OUT actions. The following exercise should be done by full cycles and coordinating the IN and OUT movements with one's heart beat. This exercise can be done in several levels of difficulty and by any person, young or old, healthy or not, even with heart or lung problems. The deepness of the exercise must be self regulated and should evolve with practice. So, here it goes: preferably lying down on one's back (but can be done sit on a chair, or even standing up) and without moving anything (as much as one can if not lying down). the breathing cycle is composed by 4 actions that should be coordinated with one's heart beat: breathing IN, holding IN, breathing OUT and holding the lungs empty: Breathe IN, filling the lungs to full capacity during the time of 3 heart beats Hold the breath IN during 3 heart beats Breathe everything OUT during 3 heart beats Hold your breath with the lungs full empty during 3 heart beats. END of one cycle, repeat. there are 2 points of difficulty that should be known/addressed: one is the number of heart beats one counts, they should be the same on all 4 actions. Start with 3 for a week, then 4, then 5..., then 10 heart beats per action = 40 heart beats on a full cycle. the other is how deep the breathing IN and OUT is. This exercise should be done using the full amplitude of the lungs, so one should have the lungs full when breathing in and completely empty when breathing OUT. Of course this is kind of difficult, specially for those who smoke, for example, or have lung problems, but one should take this easy, for easy is the way, meaning that in the first week the lungs won't work on their full amplitude, but one will work on it. This exercise has no down sides besides one's health getting better and that is, sometimes, frightening. Start slow. The regular practice of this particular exercise will gradually augment the lungs capacity and regulate the heart beat. The optimum is to do this exercise with at least 10 cycles each time or about 10 minutes per day (before bed time works well). This exercise IS a form of MEDITATION, since it centers/focuses one's thoughts on oneself, on one's breathing and heart beat, meaning that everything else gets put aside, anxiety included, during the exercise. Do not, at this point, experiment with fast and deep (full amplitude) breathing. That is a completely different exercise with also different purposes (mostly to get the most oxygen possible into the blood)... it will not calm you down when in stress. That is the competitive perspective. It's not necessarily wrong, but also not always right (in my experience, it's mostly wrong). However and some times, it also is THE correct action to do, for it puts in place/perspective things we thought as unbearable and transforms them in a grain of sand. How and when to use this as a tool is something we are constantly learning during our lifetime. This is why I'm hitting the key of "get into a martial arts school" argument, because these schools teach all of this on their essence... or at least, they should.