Allocate two to two and a half times the size of RAM to swap space.
Assign quotas to all users on all filesystems.
Monitor space with df, du, and quot (on Solaris).
Include meaningful comments in your /etc/[v]fstab file that document the physical devices associated with the system's logical designation (for example, above the entry for /dev/c0t1s2, add a comment that the disk is an external Fujitsu model "foo" with SCSI ID 3).
Document the following items in a file:
- Physical disk arrangement, including models, disk chain type and ID, and cable arrangements
- Logical disk arrangement, including devices and filesystem names
When complete, print the contents of the documentation file onto actual paper and store it in a central location (file cabinet). Remember that you don't want to lose the text file in the same disaster that ate your filesystem in the first place!