Nanny daily reports
Whether it's an app or a simple notebook, many nannies have a way to document and track sleep, meal times, daily activities, exciting events, and milestones. These notes not only serve as a way to relay information, but they can also be a keepsake for parents to look back at what their child's daily routines were and to marvel at how quickly they have grown. They are also very useful when a child is sick and it is crucial for medicine doses to be recorded.
I would encourage you to use a simple, 3 ring binder and fill it with pages with simple information. The best ones I have found are located on Etsy here. They offer pages for all ages, an emergency page with pediatrician contact information, and more! You can instantly download and print them for $5!