I too have many pots to water, and I do use a moisture meter often, but not always. I use Baja_castro's method and instructions for the most part. some pots are always going to need water, but others are easy to over water. Depends on potting medium, size of pot, and how root bound the plant is. I have found that the meter doesn't work well in a chunky medium like orchid bark or gravel. I also use my meter to judge when the lawn and flowerbeds need water.
