There's a lot of good information in this thread, but I can add this: join a SA organization and/or special interest group: Usenix, https://www.usenix.org/

There's a lot of good information in this thread, but I can add this: join a SA organization and/or special interest group: Usenix, https://www.usenix.org/ LOPSA, https://www.lopsa.org/ Then read the journals, even the articles that don't interest you now, and follow the email lists.