The best way I've learned is to look at others note. You will see things you like and things you say "that shouldn't be in there." You can borrow others ideas of what to put in notes and make them your own.
At my job we have "precut" nursing notes if we want to use them. Like: orientation, behavior, and problems for the shift.
there is actually a book "Charting Made Easy". you can find it at barnes and nobles, and it goes through quite a few different types of documentation. Experience, though, is the best way to learn, as is practice and making some templates on paper to remind you what to include with each note. Hope this helps! THE ISBN for this book is 1605471968 and its cheap on amazon!