This morning I had a major problem with corruption on the hard disk that stores most of my data. Almost all the files were lost.
But fortunately (for I am a fortunate man) I had a complete backup on an external disk drive which was last updated just under three weeks ago. Of course I am now kicking myself that I don't back up every week. However, although there will be some inconvenience it is nowhere near as much as it would have been with no backup at all.
The lesson is clear - take regular backups! My solution was to buy an external hard drive and backup onto that. You may prefer to do something different, but please make sure you have some sort of backup.
I salute all my readers who already back-up their files assiduously. This has been a public service announcement for the others. :-)