Before you take a job, carefully list what things others are going to need to do or to deliver in order for you to successfully achieve what you hope to do. Ask yourself: “What are the assumptions that have to prove true in order for me to be able to succeed in this assignment?” List them. Are they within your control? Equally important, ask yourself what assumptions have to prove true for you to be happy in the choice you are contemplating. Are you basing your position on extrinsic or intrinsic motivators?