An encrypted wallet and occasional off-site backups should suffice, no?
I decided full-drive encryption, at least for my portable computer, is important in case of loss. I don't want to worry about transient remenants of the plain-text wallet being stored on the drive. The SSD I have been looking at getting also clears data that looks like deleted files in an NTFS/FAT32. Encryption will make the data look more random and hopefully protect it from drive tampering.
The backups need to be verified because restore time is not the time to find out your back-up strategy failed. In fact, when I tested Dump/Restore using DVD+R disks on my fileserver, data near the end of the disk was lost. I have yet to figure out why. DVR+R disks/drives are supposed to support lossless linking in the even of a buffer underrun.
PS: I wasn't competely truthful earlier: I also don't use online banking because I don't trust my computer to keep proper records (not being backed up and all). Bitcoin raises the stakes and forces competence.