These are great questions to ask ourselves, because how we answer them is an indication of the type of life we're living. I'll go further and say it may even dictate our quality of life, because I think the people who have the most fulfillment are the ones helping others in some way.
Remember, a seed must die in order to develop other seeds? It's all about planting great seeds (John 12:24). This is how we ultimately help people become better people.
Imagine if all of us did that?