Also, to add on to the reading comment - keep an eye out for old (40's->70's in particular) technical books and manuals on topics that interest you. I find they had a way of conveying information that was somewhat lost once video became commonplace.
60 years with man and machine
A guy who started as a millwright in 1890. Was a touring magazine editor until the end of ww2
It's hard to find but it's a banger
For spesific methods (like jewelry making), there are pockets of web 2.0 vbullitin sites out there... kind of like hacker news
That jewelry site in question (i used it for metal casting knowledge)