A better life

When I was a teenager I'd often wonder what other people's lives were like as I walked past houses, particularly ones that looked better than mine.
I also daydreamed about living in the USA, I'd imagined that over there a better life was certain. That idea largely came from the fact that my TV died comprised a lot of American dramas - 90210, Party Of Five etc.
I think that wondering has stayed with me because I still look at other people and surmise that their lives must be better. Sure that is a very superficial assessment.
I don't have it bad. In fact I'm sure that there are a whole heap of people who would like to have had the opportunities that I have.
Small comfort, sometimes, though.
Then I think, what would it be like now if I had done some things differently. What if I'd decided to start working out when I was 16?
What if I had gone to a different university and done a different course? (That one would change things considerably I would suggest, but I have to say I do enjoy my job!).
I could keep listing questions and dwelling over possible 'sliding doors' moments. It won't get me anywhere.
If I want things to change I have to instigate them, take control of where I am heading as best as one can.
At least then I can't sit back and wonder what might have been.....