The New York State Bar Association issued a couple of months ago a report entitled, “Best Practices in E-Discovery in New York State and Federal Courts.” The report contains guidelines intended to provide New York practitioners with practical, concise advice in managing e-discovery issues in both state and federal courts in New York, and to be a reference for best practices in e-discovery based on the current state of the law -but can certainly be useful in other jurisdictions.
You may download the Guidelines here.