Cloud computing is an economic shift, not a technology shift. Cloud is gaining momentum because of its compelling economic advantages. IT services, much like farming, have become commoditized. Maintaining in-house data centers provisioned for peak demand is expensive. Cloud computing represents "IT on demand," where companies can buy what they need, when they need it, shedding the expense of data center hardware, software, maintenance, and staff. Jim Cooke, Cisco IBSG's senior director of IT Transformation, explains five steps to becoming cloud-ready.