If you want to take great notes, I've got good news and bad news. The good news is that you don't need to worry about doing it right, your aptitude and personal preference will come without any conscious thought. The bad news is that there's no shortcut except for practice, practice, practice.
Having said that, here are some of the specifics that work for me.
- This notebook: Cambridge Jotter A5 Card Cover Wirebound Notebook Ruled 200 Page. A5 means it's easy to carry everywhere. Wirebound means the pages don't flap back on their own and only one sheet needs be open at a time. 200 page is a good balance between how long each notebook lasts.
- Put a DD/MM/YYYY and a title at the top of each page, don't be too fanatical, but contextualising the notes is essential, and it helps search. Abbreviated titles and dates are fine for when the notes of single events stretch over multiple pages.
- Always write notes at everything that could be a meeting or a talk.
Everything else came with experience and I can't really put it into words, though I've always appreciated when I've taken notes under the assumption that my future self will remember nothing of the event, it's been an accurate assumption more times than I care to mention.
Don't worry about chronological order being an imperfect method of organising data, it's a strong practical heuristic.