Don't imagine yourself a victim of circumstance. Don't fantasize about being helpless unless it suits your purposes. This is part of taking responsibility for the contents of your imagination. You aren't just answerable for your physical life, but also for your mental life for it is from your mental life that your physical life emerges. If you have been mentally playing the victim all your life, it could take a while to retrain your imagination, but as your thoughts change, so will the reality you experience.
Most unexamined fantasies are inclined to lean heavily on the past.
This can lead to feelings of being stuck in the past. Instead, project many of your fantasies into the future. Use your imagination to create your future. Don't just meekly accept any old future coming your way. Use your imagination to improve your self-image.