The person who signs your checks (or otherwise determines the life of your project) expects a return on that investment. Therefore, deliver things that they consider valuable as quickly as possible.
Possible Techniques:
Anecdotes:
I just had an interesting realization: XP doesn't DeliverValue! It delivers value to the OnsiteCustomer, not to the person who signs your checks. Interestingly, the two anecdotes included above both involve failures as a result of this dichotomy. --JimLittle