All too often resources are lost because an obscure blog eventually goes away. I am asking fellow programmers to install the Internet Archive browser plugin that exists for just about every major browser and more importantly to actually use it!
If you are having a hard time finding the solution to some problem and some rando blog wound up giving you the answer, then please use the IA extension to check the recent version and verify it contains the information you wound up using. If it doesn’t, then do us and possibly your future self a favor and create a save point; just takes a few seconds!
While navigating my site, anytime you see this icon 
that is a link to an internet archived version of whatever I was referencing.
Also, if you have the means, then you should really donate something to these guys and I mean annually! They are truly preforming a tremendous service for all of humanity…
Wayback Machine Official Extension Links
Note: Even non-official extensions exist (IE, Opera) since the Internet Archive does have an API.