Fridge - Not Level overnight?

Boy, I am sure confused now. I believe I will just keep on doing what I have been doing for over 15 years. Not saying I am a pro, but here goes my process, use it for advice or not. We park at home, using my parking area that is concrete level side to side with a little slope front to back, park it and use the tongue jack to level it front to back. When traveling, we use the fridge of course and when we park, side legos go under the side I need for leveling, then front is leveled. Most of the time when on the road moving every day, we never unhook, we use blocks side to side and on the truck rear or front (if needed) to raise and lower trailer from front to back. this of course if jack on tongue is too close or far form the ground. Well, as far as parking goes anywhere else, we use the parking lots and use our blocks so we don't damage any asphalt, we also pick up our blocks as it wouldn't be right to have my neighbor do it for me! Besides, he and his kids won't fit in our trailer with us and may not want ot go along! Well my comments, never had any issues with fridge, heard a lot of do's and don'ts and will keep on doing what we are doing as it works. like the others said, follow the manufacture guidelines, level it up it only takes a minute and your good to go. Good Luck & Be Safe ! ! !