Remembering/retaining things read

• Like with so many things, this gets easier with time and practice!
• Decide the importance of remembering it, therefore whether to just have read as general knowledge (reading it once being enough), or to make more effort.
• (Not everything has equal value.)
• Sometimes, a mental note on where to look up details for that subject again, if/when ever needed (with or without writing anything down, is good for now.
• Sometimes it should be learned thoroughly, so making good notes somewhere for review & memorization will help: an outline, OneModel, Anki or similar apps, etc.
• Some people strongly recommend "SQ3R", "Cornell"(?), or similar structured study methods, which sound like they could be helpful.