The more you want something, the less power you have over it.
If you possess a great car or job for example that draws in your attention and makes you think about it a lot, it will do you harm to the degree that you think about it. In fact the more you think about it the more power it has over you and it is to that degree that it possess you!
The first step to gaining back control is to first build an awareness of the set of things that have control over you. The second step is to create a distance from those things. The less you think about them and the less significance you assign to them, will with the passage of time help you regain control.
Interestingly, this method is valid not just for tangible objects to which you attach yourself but also for intangible objects such as knowledge and social status. Here too, the more distance you create between yourself and the object of attachment the more you will reclaim your power.
On a concluding note I would like to elaborate on the meaning of power. By power I mean the ability to choose and make your own decisions. The less clouded your mind is from objects of attachment the clearer your perception will become and consequently the more aware you will be of your ability to choose.