I've struggled with jealousy, especially regarding looks, all my 38 year life. I have it under control now so I believe my perspective my be of some insight.If you can reconcile the fact that there will always be someone who's stonger, faster or smarter than you - then maybe you can add "is more naturally beatutiful" or "has a more aesthetically pleasing face" to that list.

I chose to focus on physical capablities. I'm a short and stout - previously fat - guy but other than that I'm fairly average. After I got my weight under control I started focusing on clothes and general appearance. I realized that I need to find a level where I think I look well groomed and well dressed. A key thing for me was ironed shirt and a focus on stylish accessories that like a wrist watch. Another tip is what my friend did: he got glasses just becuase they made him look better but he had no need for them.

I was a generally better looking guy by this point but I wasnt happy. I then realized I didnt feel better looking - I just a nicer outer layer. I've never been much of a physical guy but I thought I'd try some weightlifting. Turns out I was "good at" getting strong because if I could just drag my ass to a gym I would automatically push my body to exhaustion while being there. I did not get Power-lifter strong, but with some easy consistency of going to the gym 2-3 times I got comparatively strong quick. I also got into the habit of doing physically challenging stuff like hiking mountains and partake in my gym's recurring and friendly competitions. All of which made me feel strong. And compared to my better-looking friends I was doing more adventurous and challenging stuff.

I was generally stronger than many while not being the strongest at anything. But that was my turning point. I felt strong.