I joined ProPilotWorld.com while earning my CFI ratings, and it's been an invaluable resource to me throughout the beginnings of my flying career. Two of my flying jobs have come from ProPilotWorld, and my career path has largely been based on the information available on this site. ProPilotWorld.com is head and shoulders above other aviation forums in terms of the professionalism of its members and quality of the discussions. I don't know where I'd be today without it. If you're a career pilot, you need to belong to this site.