One of my favorite tips was from an endurance rider. You know how five gallon buckets can stick together and nothing except maybe dynamite will separate them? Well this tip only works on the ones before they are already stuck! When you pack up, and your buckets are still wet, take a piece of twine and put it between the buckets when you store them. They will come apart easily as this keeps them from sealing up together when they dry.
One thing that has always stuck in my mind from when I was a student in the equine tech program at MCC was keeping the barn aisle floor clear of anything. That way you don't have any "traps" to cause an accident for horse or human, and it makes the whole barn look so much neater and well managed. Sweeping or raking (depending on the floor) every night adds to the neatness, too. I had a dirt floor at my first barn. We raked it last thing before leaving the barn. In addition to looking clean, you knew the next morning if anyone had walked into your barn while you were away.
One thing I learned about hot weather distance riding when I was living and riding in Texas/Oklahoma was to tie one of those natural sponges to my saddle when starting out. Then, whenever we crossed a stream, while my horse was drinking, I'd drop the sponge into the water and wet down his neck, butt and whatever else I could reach. It really does help your horse stay cool.
I lived in Dallas during the summer of 1980 when we had 100 days of 100+ degrees. Many days were 114-118 degrees. There was a creek crossing on our regular trails, and I did the sponge thing even on short rides. My horse loved it, and he always came in cool and comfortable.
P.S. I have a t-shirt that says, "I Survived The Summer of 1980"
I agree the sponging idea that you get from distance riding is a great idea. I learned a lot about my horses health during those years. Did you and your saddle pals ever have sponge "fights" at the creek crossings? I left a lot of water crossings as drenched and cool as my horse was!