The trick generally is to break programs into pieces and have those pieces be individually testable and so then when you move on to the other pieces you treat it as a black box knowing that it either works or doesn't work.
Bill GatesI'm quite worried about the fiscal imbalances that we've got and what that might mean in terms of financial crisis ahead.
Bill GatesNobody spends any money on smallpox unless they worry about a bio-terrorist recreating it.
Bill Gates