MEDIUM priority (Important overall)

3. Seed torrents for as long as possible, rare data forever. Make sure to look up a guide for your router to PORT FORWARD your torrent client port, to substantially increase your upload (and your download) speed. In low population torrent swarms, if no one is port forwarded then you might not be able to connect to each other at all and exchange any data despite having it.
Requirements: As much or as little bandwitdh you want (you can set the limits if you need to)
https://github.com/qbittorrent/qBittorrent (Recommended client, especially to replace uTorrent)

4. Archive web pages you want to have a local copy of with a "Web Extension for saving a faithful copy of a complete web page in a single HTML file with a single click"
https://github.com/gildas-lormeau/SingleFile

5. Archive videos with "GUI front-end for youtube-dl, yt-dlp and other compatible video downloaders"
https://github.com/axcore/tartube

6. "Capture or record any area of your screen and share it with a single press of a key"
https://github.com/ShareX/ShareX

7. Archive entire websites you want to have a local copy of
https://www.httrack.com/