I've placed an Amazon order for additions to my little greenhouse: seedling germination heating mats, a temperature logger with internal and external sensors, and a remote controlled outlet thing that will let me turn off the heating easily.
I already have a temperature sensor, but without a guide as to the external temperature, i was left with a mystery of whether there was any "greenhouse effect" going on at all. The historical temperature logs i could find were far enough away that i had no idea as to whether it was appropriate for my location. With three sensors i can measure the bottom of the greenhouse, the top of the greenhouse, and outside. Then i can get an idea of how effective running a lightbulb is in there and so on.
When i say "greenhouse" i mean a 4-Tier Mini Greenhouse, 27" Long x 18" Wide x 63" High thing. It's not big, but it's enough. Unfortunately
(Oh, my, the temporary greenhouses.... I could shelter a dwarf orange and Meyer lemon on the west side of the garage some day, as well as the little avocado tree if it survives....)
Meanwhile, i decided i was taking today as a vacation day when i failed to really get going. Instead i was pretty focused on going through a virtual stack of "to do" items to look for any urgent and important items, to remove items i know i've done, and to leave the rest for a miraculous time when i might consider them.