One Notebook for O3s and Meetings

I use OneNote as my primary notetaking tool. It has fantastic indexing and searching. I keep a separate notebook for each direct, one for all my other meetings, and one for miscellaneous notetaking. Each recurring meeting gets it's own tab, with a page for each instance of the meeting.

You can also create custom tags to highlight text. For example, I have a tag for positive and negative feedback that allows me to search a notebook for all instances of that tag. The tags are super useful for annual reviews.