About 25 years ago I had an incident in which having an up-to-date set of backup disks saved my bacon. Since then I have been compulsive about making sure I keep backups of my computer's hard drive.
As hard drives grew in capacity (yet shrunk in size), it quickly became infeasible to use floppy disks to back up one's hard drive. I started using external hard drives for my backups.
And as the external hard drives also grew in capacity (while shrinking in size) it became extremely easy to set a backup programme running and just keep the external drive plugged into a USB port.
The problem I ran into began about 15 years ago when I started using only laptop computers. I'd sometimes stand up, put the laptop aside, and BLAM, the external hard drive with my backups would go slamming onto the floor or against my desk.
I'm a slow learner, so that had to happen twice (fortunately not damaging the backup drive either time) before I came up with the velcro solution. I velcro the external, backup hard drive to the lid of my laptop, and I've done so ever since:
Simple and effective. So much so that my older son, David Ricardo Palmer, has adopted the technique as well.