Do everything for your own pleasure. I always thought the definition of darkworker might as well be the actions themselves. To polarize yourself, you just "be" the definition of a darkworker.
If you want more specifics, take a good, hard look at your life, and pick apart your motives for doing each thing. If you're doing them out of a sense of duty, drop those actions. If you're doing them because you enjoy them, and they give you some kind of good feeling--pride, confidence, even arrogance is cool too--then keep them.
Never let anyone guilt you into anything. Selfishness is the symbol of a true darkworker.
Most of the time, it's really a change in mindset. Shifting to "all for one" instead of "one for all."
Ditching morals is a very good start. Once you can pretty much feel that you're top priority, over others, duty, religion, morality, society--over humanity itself... well, isn't that darkworker enlightenment?