When you are involved in an activity, a project or even a relationship - ask yourself "What's in it for me?" Your answers to that question will help you to decide the degree to which you are invested.
When you are involved in an project, activity or even a relationship, is the return on your investment in time and other resources worth it? When you ask yourself, "What's in it for me?"... Do your answers inspire you to go forward and continue? Or do you have to rethink your involvment?