These are my public bookmarks - since none of the social bookmarking tools I tried worked for me, I'll just drop my bookmarks here. Mostly it's just for myself but maybe you might gain something from it as well.
—For making digital art—
http://www.inkscapeforum.com/index.php?sid=839b3c3daf9c4cb415c0042b1cda4e3b
—For making material art—
http://www.woodworkersjournal.com/evan-blomquist-high-voltage-woodburning/
https://www.sketchup.com/learn/videos/826
https://www.artconnect.com/spaces/ateliersharing-in-der-kunstkaserne-berlin
http://www.guarnero.com/stargateclock.html
https://learn.adafruit.com/neopixel-60-ring-clock/featured_products
http://maslowcommunitygarden.org/Maslow-CNC-Kit.html
http://www.holzwerken.net/Blog/Heiko-Rech/Schienen-Adapter-Saegen.-Was-passt-wo
https://www.elektormagazine.com/labs/a-tube-theremin
https://github.com/BareConductive
—For gaining knowledge on new music—
https://mixmag.net/feature/lisbons-electronic-music-scene-is-stronger-than-ever
https://www.vice.com/en_us/article/xyp4nd/afro-portuguese-remixes-american-rap-principe-discos
https://www.laweekly.com/music/10-trap-songs-for-people-who-dont-know-shit-about-trap-9532586
https://www.hhv.de/shop/de/artikel/v-a-dramatic-funk-themes-volume-1-132579
—For mixing music—
https://www.cs.ubc.ca/~davet/music/bpm/102.html
https://www.beatport.com/release/puente-roto-remixed/2002936
https://musicbrainz.org/artist/3fe817fc-966e-4ece-b00a-76be43e7e73c
https://www.bpmdatabase.com/music/search/?artist=&title=&bpm=102&genre=&page=2
—For knowledge on digital society—
kaput-mag.com/critics_de/zu-hause/
https://pitchfork.com/features/overtones/how-do-we-live-with-music-made-by-problematic-artists/
—For doing research—
How to get the publishing date of a website
www.wissenschaftlichesarbeiten.pbworks.com/w/page/11606724/Organisieren
http://www.typovia.at/index.php/desktop-publishing/din-normen/din-16511-korrekturzeichen
—For video stuff—
https://screencast-o-matic.com
—For being outside in Berlin—
https://www.berlin.de/wlan/5112643-4236202-karte-freie-wlan-hotspots-in-berlin-und-.html
http://tk.gis-broker.de/gds_tk/index.jsp
https://www.cafe-grenzenlos.de/startseite.html
—For getting to know my past—
https://www.nordicnames.de/wiki/ALF
https://en.wikipedia.org/wiki/Category:Old_English_personal_names
https://en.wikipedia.org/wiki/Germanic_name
—For being a vital part of society—
https://www.das-nachwachsende-buero.de/
—For getting to know art—
http://www.artnet.com/artists/bruce-nauman/triangle-a-Trm4gk_DooNcKj0q8vOEbQ2
https://www.artstation.com/artwork/4Oo58
https://www.museumsportal-berlin.de/de/planen-organisieren/tipps-zum-eintritt/jahreskarten/
https://en.wikipedia.org/wiki/History_of_art
https://en.wikipedia.org/wiki/Symbolic_behavior
—From the mind to the body—
https://voebb.onleihe.de/berlin/frontend/mediaInfo,0-0-546566386-200-0-0-0-0-0-0-0.html