I personally only use the Google calendar widget and it's the only one I feel that is useful. I'm sure there are other widgets out there that I could be using in my daily life.
I've got Google Calendar, Google Keep and my weather app set up on my right screen (swipe right). Gives me all I need in one place and they just about fit onto one page.
Home screen and Page 2 - I only have two pages. The clock app is mostly for a quick way to see when my next alarm is, plus easy access to the alarm page for changing them around.
I have the fit one, and the switchbot widget that shows the temperature of the house. I also have the calendar widget on another screen, but I actually rarely look at it.