Dreaming of a barricade means there are obstacles holding you back. At work, pay attention to the projects that you are assigned to, and make sure things go according to plan without anyone sabotaging your progress. In your relationships, start eliminating the dead weight and those who contribute little value to your life.
Dreaming of sadism means you derive pleasure from inflicting pain. At the workplace, you play a destructive force in sabotaging projects and seeing it fail to make yourself feel good. You view this as having a dominant power over others, but in fact is a misguided application of your own failures as a person of being able to do good for others and succeed at projects.
In sex, you find delight in the excessive cruelty environment created for others.