An ongoing problem since the start of the world wide web is that the web is unable to archive itself. A lot of websites are being created every day and a lot of them are going dark without prior notice. These websites like forums, imageboards or what have you contain a lot of user generated content. For some people this content is a snapshot of time of which they may have very fond or not so fond memories of. It is or was a part of their lives. The way I see it it is part of our combined digital history. History that will be erased from the face of the planet if we don't do something about it to archive it. We shouldn't be so careless about it.
This is where ArchiveTeam comes in. They DO care about the internet as we know it and the content that is being created every day. Their team is made up by a bunch of rogue archivists and volunteers that have a common goal: archive all the things before they get taken offline and make them available again; either in the wayback machine or as a digital download. They have already saved terrabytes of data from disappearing.
Now the good thing is that YOU can help out as well. They have pre-configured virtual appliances 's they call ArchiveTeam Warriors. These warrior's can be used by people that want to help out archiving but don't necessarily have a lot of technical knowledge. Running a warrior is simple and doesn't cost you anything more than a tiny bit of disk space, come CPU power and a bit of bandwith. Please help out where you can and run a warrior for the team. Help archive the internet. Have a look at their wiki at http://archiveteam.org/.
Want to see a video explanation?