Do you document how your day has gone? Do you do a write up for each child or do a general write up with major points, like a journal entry?

I used to do a write up for each child at the end of each day and it would take half an hour. Plus it would use up so much paper. I stopped doing that a few months ago when some providers told me they don't even document their day. I don't like NOT documenting, i feel like i should be doing it but i don't want to spend half an hour writing up each child. What do you do?