The leaders who work most effectively, it seems to me, never say 'I'. And that's not because they have trained themselves not to say 'I'. They don't think 'I'. They think 'we'; they think 'team'. They understand their job to make the team function. They accept responsibility and don't sidestep it, but 'we' gets the credit. This is what creates trust, what enables you to get the task done.