How has everyone found the best way to notify customers is? For major problems I make a direct call. For up coming things like seeding, aerations, etc I make a not on the invoice and/or send out the mass email. I've tried to make calls, but seems between both mine and their work schedule its hard to make contact. I've had pretty good success with email and invoice notes. Although I do have that handful of customers who sees "aeration will begin on the 15th" and they decide to call the 1st!