1) There is a Wiki for almost everything you can imagine. I am pretty sure you can spend whole weekens just clicking around in some random GoT, LotR or Harry Potter wiki
2) reddit.com is a never ending source of entertainment if you know how to use it:
2.1) Go to any sub which kind of interests you and sort either by "top" or "controversial" for "all time". "controversial of all time" is especially interesting if you apply it to subs like /r/relationships (if you are into that kind of thing).
/r/UnsolvedMysteries and /r/AskHistorians are by far my favorite subs at the moment
2.3) /r/ThreadKillers/, /r/DepthHub/, /r/goodlongposts/ are also a good sources of interesting posts
3) If you are into DIY, building boats, woodworking, metal lathes, surface grinding, scraping, and stuff like that, then you will and endless supply of videos on YouTube.
My favorite channels are This Old Tony (his newer videos are incredibly well made and very funny if you like dry humor. Check out his video on how to cut threads on a lathe https://www.youtube.com/watch?v=Lb_BURLuI70), Abom79, Clickspring, Keith Rucker, Keith Fenner, Stefan Gotteswinter, Walter Sorrells, ...
4) Reading trip reports on https://www.erowid.org/ is also a good way to waste a lot of time
For 40k, it's hard to go wrong with 1d4chan, the offical wiki of 4chan's /tg/, and home to such legendary tales as Ruby Quest, Love Can Bloom, The Golem's Garden, The Hamlet of Tyranny, Drew The Litch, The Millenial King, the Dread Gazebo, and the now legendary tale of Old Man Henderson, as well as a wealth of bizarre invented games, even weirder settings, and 40k and tabletop related content.
Erowid is great. What really makes it special is all the trip reports for things you've never heard of, or heard of but can't believe someone would voluntarily try, or heard of but never occurred to you that someone might consider it a drug (#2: datura; #3: catnip).
1.1) My current favorite is reading about the Warhammer 40k universe: (http://warhammer40k.wikia.com/wiki/Warhammer_40k_Wiki and http://wh40k.lexicanum.com/wiki/Main_Page)
2) reddit.com is a never ending source of entertainment if you know how to use it:
2.1) Go to any sub which kind of interests you and sort either by "top" or "controversial" for "all time". "controversial of all time" is especially interesting if you apply it to subs like /r/relationships (if you are into that kind of thing).
2.2) Start with this post on interesting subs: https://www.reddit.com/r/AskReddit/comments/28il5s/what_is_a...
/r/UnsolvedMysteries and /r/AskHistorians are by far my favorite subs at the moment
2.3) /r/ThreadKillers/, /r/DepthHub/, /r/goodlongposts/ are also a good sources of interesting posts
3) If you are into DIY, building boats, woodworking, metal lathes, surface grinding, scraping, and stuff like that, then you will and endless supply of videos on YouTube.
/r/ArtisanVideos is a good source for interesting videos. If you want to find your own content you should have a look at this list: https://www.reddit.com/r/ArtisanVideos/comments/3v264a/meta_...
My favorite channels are This Old Tony (his newer videos are incredibly well made and very funny if you like dry humor. Check out his video on how to cut threads on a lathe https://www.youtube.com/watch?v=Lb_BURLuI70), Abom79, Clickspring, Keith Rucker, Keith Fenner, Stefan Gotteswinter, Walter Sorrells, ...
4) Reading trip reports on https://www.erowid.org/ is also a good way to waste a lot of time