Backups: only what you need

• Backing up too much data is nearly as bad as not backing up enough data

• Do back up: * your personal files * the list of apps installed from repos * actual apps you've “cowboy installed” * everything in /etc * dumps of any SQL databases you have * crontabs

• DON'T back up: * the actual files installed from repos * binaries of SQL databases * devices, sockets, Things Of Which You Wot Not