Yup. Sometimes I'm surprised at what my travel times are between places that I consider close too.
I was used to keeping a detailed log in my former career so it's second nature to me to record my day in detail, and it's quite usefull on the rare occasion that a customer claims I didn't service their account on a date I invoiced them for, claiming they were home all day and I wasn't there. "In fact Mrs. Jones, I arrived at 10:32 am and mowed your lawn at 3.0 inches with my Turf Tracer HP mower, finished mowing and began trimming at 11:04, started blowing he pavement at 11:13 and departed at 11:18. I collected an armload of sticks and disposed of them at no charge and pulled some weeds from the flower garden on the left side of your front door, also at no charge. Would you like me to fax you a copy of my log book?" Does the trick every time.