We have a great sysadmin at work, and I've learned 3 very important lessons: Have redundant everything. Backup everything. Provide tools to talk to production

We have a great sysadmin at work, and I've learned 3 very important lessons: Have redundant everything. Backup everything. Provide tools to talk to production systems, databases, but make them read only and make it hard to mess with production systems unless you're reallllllly sure you know what you're doing.