https://isocpp.org/faq (what Marshall Cline's excellent C++ FAQ has become)
and here:
https://herbsutter.com/gotw/ (Not as organized, but Herb Sutter wrestles with the essential questions of how to deal with the tricky bits of C++)
If you've got the cash, read Effective Modern C++ by Scott Meyers.
Finally, if you're ready to snark at all you've learned, read the C++ FQA:
http://yosefk.com/c++fqa/
https://isocpp.org/faq (what Marshall Cline's excellent C++ FAQ has become)
and here:
https://herbsutter.com/gotw/ (Not as organized, but Herb Sutter wrestles with the essential questions of how to deal with the tricky bits of C++)
If you've got the cash, read Effective Modern C++ by Scott Meyers.
Finally, if you're ready to snark at all you've learned, read the C++ FQA:
http://yosefk.com/c++fqa/