The soil make up can vary from course sand to store bought potting soil and everything in between. Course dry's out fast. Then there is vermiculite etc. Potting mixture requires study. Pot shards in your pot to encourage drainage seems the rigor.
I think that large pot size can deal withy mistakes better than small pots.
We soak our orchids once a week and mist on occasion. All of this is dependent on time of the year which effects humidly and light. Other plants are watered according to their nature and we have killed quite a few in our time.
I guess there are electronic water determining devices but I am ignorant of them. Still amazed that I can get a stud finder to work.
Bill