I recently managed to accidentally delete the entirety of a personal C++ project on which had been working for a couple of days; after attempting to create an archive without tarballing the folder, I noticed that the files had been compressed individually, which was not the desired output. After running <code>rm *.gz</code>, I realised that I had forgotten to specify that the original files should be kept; as a result of this, I had accidentally deleted every project file. Instead of kicking the shit out of my table and forcing myself to spend money on new equipment, I understood that this was entirely my fault and could be prevented in the future. Luckily, I managed to recreate the entirety of the project in less than an hour, and it runs nicely.
_Remember to make back-ups._

On a different note, as if to prove that the majority of recent software is worthless, the recent Firefox update runs like AIDS on my machine (i5-2520M + 8GB DDR4). Fix your shit, Mozilla. This is inexcusable.