This entire site is about Open Source Intelligence (OSINT) and its follow-on, Multinational, Multiagency, Multidisciplinary, Multidomain Information-Sharing and Sense-Making (M4IS2), so your search might have been better off with just a search for basics, or training, but here is what human-in-the-loop offers both to answer your question and to result in an automated hit the next time someone asks the same question.
Search: “best practices” and “osint training”
Search: free intelligence training
Search: United Nations Intelligence Training
Search: The Future of OSINT [is M4IS2-Multinational]
See also:
- About the Idea (39)
- Articles & Chapters (70)
- Books (OSS/EIN) (11)
- Briefings & Lectures (67)
- Definitiions (9)
- Graphics (179)
- Handbooks (41)
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- History of Opposition (13)