Most of summer around here is pretty much spent prepping for winter. Firewood needs to be cut, split and stacked. Six months of hay needs to be hualed in and stacked in the barn, with the excess stacked outside and covered. It generally starts cooling down around the end of August and we have a nice long Fall. This year we started getting snow in late September with temps in the single digits by October. But now we're having a nice Indian summer.
Once it starts cooling down (20's) we cover the windows in the chicken coop, I get caught up on all equipment services, add fuel treatment to all equipment that will be stored until spring, add anti gel to the diesel. Change engine oil from summer grade to winter grade in the gasoline generators. I put everything away that's been left outside, otherwise it'll be covered in snow until May. I have to plan my snow plowing routes (over 2 miles long) and make sure that I'll have places to push the snow when it gets deep. Every building needs a snow shovel. Last winter I couldn't keep up with the snow fall and had to turn the cows loose and feed them on the road. This winter I'm going to try keeping a small valley cleared to feed in. Some of the cows will start calving in January so they'll need to be kept out of the wind too. Last February we were snowed in for almost 2 weeks. We need to stock up on food, fuel and spare parts. Next week I'll put chains on the tractor and my 4 wheeler, make repairs on the tractors rear blade and weld new skids on the front snow plow. I need to make repairs on the snow blower and get it ready to go. I put markers around everything that can't be put away so that I don't hit it with the plow. Plus I try to get roofs put on my building projects before the snow starts coming down for good.
That's all I can think of for now.