...AWS users — and all cloud users — cloud supporters and many analysts argue, could stand to learn a lot about how to design their cloud application infrastructures to handle failures on their cloud provider’s end...
http://gigaom.com/cloud/8-possible-outcomes-from-the-great-cloud-outage-of-2011/
The best practices are what saved most of the AWS customers in the recent outage, though the news took several rounds with start-ups as examples. Anyways - for some, these 8 solutions are for future and for others these are a way of life.