What did you do to your Class C MH today???

My two sisters and I went to the Powder Valley Nature Center yesterday, in Kirkwood, MO. A suburb of St. Louis.Part of the MO Dept. of Conservation. Had a great time.walked a couple of the short trails. Had a nice snack in the C while on the parking lot. Its great having your home with you when doing something like this. Was standing at the window last looking out at the C just before I went to bed and the thought came to mind that I had forgotten to turn off the propane tank, we needed the furnace yesterday. Went out this morning and turned it off. I will have to come up with a system to let me know what I have turned on, or if I put the jacks down, the antenna up, etc. I was thinking a white board by the door. What other ideas out there that people use for reminders.
Bill