I simply have a white board at the front with spaces for eating, napping, toileting, behavior and comment beside each child. At the bottom I will list the menu for the day. What needs to be written is on there and if the space is blank in means that everything was normal. This is the perfect tool for me because it gives the parent all the needed info in a glance and I also use it to remember things I need to tell the parents such as needing a new change of clothes or diapers.
I never felt the need to have a journal as my parents would likely not read it and it would create that much more work for me.