Having a good network is a key asset of a CIO. Not that network - I mean your personal contacts. I'm a member of the Property IT Directors Forum, run by the indefatiguable Chris Lees at Calvis. 30 strong, it's members are the most senior person responsible for IT in almost all of the leading agents and property companies.
We get together from time to time, and if anyone has a question they can send it out and within an hour of two you'll have 10 responses. If you're a CIO and there's one of these in your sector, then join it! (and if there isn't, then start one)