You do not understand, the procastination is not wanting to do something cos there is something inside of your heart that is holding it back, so each day is a struggle to bypass that and push beyond it to complete the task. So hence the OP is asking, "what is the best strategy for me to find something and do something as a job that I cannot have this feeling of needing to stop myself from doing this?" To me, this is a very mature thing to do, cos it is taking responsibility of oneself, and their life.
I have read the original post, and I myself have gone down a similar path too, but I can say to the OP that, maybe it is best to always start a business which you find curious and has an interest in. Also, maybe your life's journey will not be static. You can try different things, and gain different experiences to suit you as well. I set myself a goal 11 years ago, and in 2 year's time, I too would be financially free.
What I have forsaken was to settle down and have children, which was my original aim. I also thought about starting my own little business too around this time. But it took me a long of emotional credits to be where I am now, and I am totally burnt.
I thought of a lot of ideas back then, but even now, I have not thought of a more solid idea, but I have better ideas on what I like best. i.e. food, dancing, nutrition, ayurvedic (which is something I found out today, and is equivalent to Chinese medicine too). To me, I won't ever be a psychologist, cos it is not me, and not what I represent. Healthcare and eastern medicine is more and more popular now in the UK than ever before, so there is a gap somewhere too. I may consider things like that.
To me, to add value to society is to provide something of offer which does not exist. Why does "social networking" works so well in the US and is labelled as such? Because in the move towards globalisation, the community spirit is dead. this also explains why the increase of psychologists exists in the past 10-20 years, rather than to create communities, ,and enhance social cohesion. There is a movement now across many US states in bringing manufacturing back as a local basis. I whole-heartedly embrace this. I read a magazine called Monocle and this shows you the trend of how people live these days. If you are serious about starting a business, which holds true to your heart, and add social values, then the magazine may give you some ideas?
I would if I could, eliminate obseities... and how people cannot even get access to fresh food ! Basic human right. I too hope to add value to society...