And I don’t mean for your retirement (although that’s important too!).
I spent the first hour this morning working on the design for a client’s team away day and was just about done and delighted with what I’d put together.
Before sending to the client I thought I would delete an extra tab in the spreadsheet and dutifully cliked the “confirm delete” only to see all my work come undone. And you guessed it, my last save had been some time ago so I lost some great stuff and Excel won’t let you undo sheet deletions!!!
Thankfully because my mind was fresh I was able to recreate it what I’d put together (with some improvement too I believe);
But the motto is: save, save and save again (and enable autosaves too).