I use google cal similarly to how Dawn uses it; scheduling upcoming events, daily tasks/booking appointments etc. Instead of emailing I send a quick text in the morning or night before letting them know the cal is up to date (due to be synched with their mobile calendar) for the week or day or whatever and maybe touch on some major updates. Many small business owners have great ideas and products but just need a little extra help managing their time, that's what calendar management is all about