I have a process by September I put all the pots on the patio so I cannot miss them.
There are three windows in different rooms facing the patio so when I look out the window I will know if I left something. I watch the extended weather forecast and try to bring things in as close to our first frost as possible. We have such a long winter I do not want to bring them in too soon. I prefer to push it to Nov especially the ones that can handle a little frost.