You, Your Team and Your Project

What is most important, you, your team or your project? It is true that people always seem to blame 'you'. It always seems as though 'your team' could have performed better. Suppose you have a decision to make: do tasks allocated to others or help others who are weak so that 'your project' succeeds or do just the tasks allocated to you and tell others that 'you' have kept your commitments adequately, but 'your project' failed. Which will you choose?