One idea is that population competes for positions, and that restricts your choices early on. You could imagine that you're either pushed away or drawn into some position. Another point of view is to see your actions through constraints, which is an inter-related point of view to competition. You're bound by money, time, energy (you can do just so much), and other resources. You can see your situation also trough psychology. You have fears, traumas, addictions, etc. Then there's intelligence that translates into how good you're at creating goals, how good you're at seeing yourself, how good you're at listening yourself, how good you're at solving problems, and how aware you're of your current condition, etc. in addition to having the ability to become better at such matters.

It's clear that all these things define how well you're in control what you're doing. There are a lot of outside sources of influences that you need to be aware of. All kind of distractions, commercials, games, noise, propaganda (manufacturing consent?). Your society wants you to do this, your employer wants you to do that, and often times you feel you have to give in, which means that you're fighting for control on a psychological level.

Creating your life so that you're 100% in control all time is very difficult, if not possible, but you can become aware of what's happening in yourself as you click mindlessly trough the internet, or when you do things/tasks you don't really want to do. You can change yourself to overcome procrastination in order to become a person that knows what he's doing, not just because you have to, but because you want to. You want to take part in society, you want to work for good causes, etc. You want to study in university to get into a certain position. And all this will that you're aware of diminishes the amount of random choices you make, I claim.