The Catholic church has a great general message of service, forgiveness, and unconditional love. (religion.blogs.cnn.com)
I like oracle cards that have one big, general message at the top that can be expressed in a few words. (mindbodygreen.com)
Create general messages (notification of 8th grade field trip) or messages for specific circumstances (account balance low, truancy warning letter, discipline notification, etc.). (teacherease.com)