Over watering is not the amount of water used it is how often you use it. Do this and you will have root tip dying looking for water and main roots drowning from having water dumped on them every day. If you want healthy plants give up the bull shit and water them. Don't water a wet plant that's how you avoid over watering, like dubs said frequency is what it's about, and patience. Having the patience to water it and leave it alone until it needs more, it's watering don't make it hard it's simple stuff