For time-related tasks and events, I have used Day-Planners, Franklin-Covey planners, and PlannerPads. I pick one with enough space for the notes I usually make each day. This saves me the trouble of creating the month index pages.
For general notes, I have used regular blank notebooks, with an index page in the front. When I refer to some notes I took more than once or twice, I add a line to the index page, with some title and the page number. That makes it easy to find it again.
For general notes, I have used regular blank notebooks, with an index page in the front. When I refer to some notes I took more than once or twice, I add a line to the index page, with some title and the page number. That makes it easy to find it again.