Food ~ I know vets don't recommend leaving food down all day for your pets, but feeding them at intervals throughout the day. I have always left food down for my cats. They have 4 dry foods to choose from, and they get a treat of canned food 1-2 times daily, plus treats a few times a week. I can't stand the thought of any animal being hungry. It probably comes from my mom's habit of always feeding everyone and everything in sight :) Make sure you feed your pets quality food. And if they are having digestion issues, skin rashes, etc., take a look at the ingredients in the food you feed them. Also if you have multiple animals, and some tend to hog the food, make sure the others get a chance to eat. Dogs often eat everything in site, leaving other dogs and cats hungry and malnourished. Watch them at meal times, and make sure each gets adequate food. My cats each have their own food bowls, and they are used to it. They don't try to take the others' food.
Bathroom Access ~ I have cats so I have four litter boxes throughout my house. I scoop them 1-2 times daily, and wash them out once weekly, and put entirely new litter in them. I use clay litter, which is safer than scoopable litter. If you have puppy pads down for a dog, please keep them changed and as clean as possible, and if your pet uses the bathroom outside, make sure you are able to let them out within a reasonable time frame, and don't make them wait all day while you're at work or shopping, etc. If you're going to be gone all day, consider hiring a pet nanny to give them fresh water, let them outside, and possibly even feed them. Pets need attention! Take care of them, and they will give you years of unconditional love!