Today’s Mantra: If They’re Dragging You Down, Get Some Distance
It’s not just about removing the bad though. You need to simultaneously seek others who lift you up. Look for mentors, people you want to be like (not look like) and people who inspire you.
Search for others who share the same interests, people who are positive and look for resources (GymKaki, blogs, sites, etc) that are in line with the person you want to be. You can’t control everything, but you can make attempts to make your environment (which includes the people around you) more positive.