He absorbs the powers of the other Heroes to become stronger. Admittedly, he kills them in the process. I wouldn’t do that.
Still, I think it’s valuable to try and be like Sylar.
But instead of murdering the people whose powers you desire, study their work and their life. With any system of thought or individual you come across, try to learn their what their superpower is and absorb it into yourself.
Do this with every individual, community and ideology. Do not let them suck you in. Instead, remain an outsider, observe them and absorb what is most valuable.
Be a nice, kind, non-murdering version of Sylar.