Do NOT sit there and think you're just there to "throw the gear lever". You are there as a crew member, and you need to realize that a lot of things are in your hands as well as the PIC's. I don't know who you're flying with but you may very well realize you have a captain that flies like a cowboy, ignore's a lot of rules, or has much different views of what's safe than you do. If you run into one of these guys you cannot let them jeoprodize you and your passengers' safety, or your ticket. There will be times when you will have to draw a line in the sand and stand your ground. Those are the tough times, and not a situation any of us should have to deal with, but it could happen. Stand firm when you need to, and operate as you know you should. If your boss' doesn't then you'll be looking for another job, but at least you'll still be around. There are still a lot of those single pilot mindset crusty old corporate/charter pilots out there, and they are a danger to everyone. Hope your's isn't one of them, but if he is be ready for it. First and foremost though, do not view yourself as anything less than the qualified crewmember that you are, and act appropriately.