Disaster recovery is one of those things we hope will never happen, and in many cases we act like it never will happen. But when that horrible day comes you better believe a good tested plan will pay off in spades. Most people find it scary because they really don’t know where to start, so work thru these steps to get started
NOTE: This process should take several months or up to a year to get to step #6. These steps are the core points that will get you to the end and if you focus on getting thru them all the other steps in between will take care of themselves.
Here are some great articles that you can use to help plan with your disaster recovery planning.
Configure and manage SQL Server availability groups for SharePoint Server
Plan for disaster recovery (SharePoint Server 2010)
A Microsoft Word Document Template For Disaster Recovery Planning
Very good content.