For your potential amusement, below the photos are the non-personal parts of an e-mail I recently sent to a person who asked me about house sitting [with later comments in brackets]. As you will read, some (perhaps most) of this is about what I prefer. By clearly requesting what I need to do a good job, I am hoping to encourage other parties to be just as clear with their own requests.
A recent satisfied client (first looking pensive, then exploring, and finally near a blossoming fruit tree, which isn't really in the shot, because in order to take the photo I had to throw her leash over that pole, and then she stepped over it, and GAH). Photos taken on Mount Tabor.
Me as a house sitter
I try to be a "leave no trace" house sitter who provides maximum emotional support for your animals.
At your convenience I will come over for a pre-meeting in which you can tell me what their routines are and your preferences in case of emergency (vet, etc). I will also handle lights and mail and paper if any; let me know what you prefer about your plants.
I will usually walk your dog in his/her own neighborhood, at his/her own pace, but occasionally I take dogs to my favorite walks on Mt Tabor. (Flat or hilly depending on fitness of dog.) Walks will always be on-leash unless you would like the dog to go to a local dog park as well. (Depending on whether the dog gets to know me, sometimes the dog park is a bad idea - can't find his/her human again etc.)
[numad: For example, the dog pictured here had too much arthritis to rough-and-tumble, so for her the dog park was out. In the personal meeting I will find out the owner+dog preferences for meeting+greeting other dogs: bit of scuffling OK or zero contact? Thanks to Mary and Monique (and Kylie and Saffron) and Jill (and Hannah and Lola) I have learned the basics of being a dog-human - not to professional level, but at least I'm farther along than a civilian. And of course I don't expect cats to to warm up to me or even show themselves unless something is not to their liking or they are "prefer to sleep on a warm person" cats. And thanks to Rob and Joe I am reptile-positive...]
What I prefer to do is set up my double-sized air mattress in an open space on the floor. (You can tell me which room.) I will use a clean pair of your sheets (so they'll smell "right" to the animals - usual washing products etc.) and throw a blanket over them (could be yours or mine) and bring my own pillow. The animals are welcome to sleep on or near me since they will be missing you keenly. Wherever possible I will do the same things every day at the same time and this will also have a calming effect.
The only other thing I need is a place to set up my computer. (Wireless net access is a bonus but not required.) Kitchen table, dining room table, whatever. (NOT your desk. Privacy - personal magic - etc.)
I bring my own food in a sealed bin (dogs can smell my protein bars, which have chocolate on them, and I know chocolate is bad for them) and my own cleaning products (melaleuca - tea tree oil based). If you have fresh bread I will freeze it and you can ask me to finish open bottles of milk. You will probably notice that I've been in the kitchen but otherwise my goal is that you will come home and there WON'T be an adjustment. (And you don't have to change the sheets either before or after.) I wash clothes at my own place. [numad: right now this means the place of the family members I am staying with.]
If your dog is a shredding dog (some aren't), anything major that is shredded will be captured in a plastic bag so you can perhaps put it back together or at least know what happened to it. (Usually by the time I find the pieces I can't tell exactly what it was.)
If I am borrowing your car, I can drive you to the airport and also pick you up. This is optional. I have full insurance and a roadside assistance club membership and will return the car with a full tank of petrol.
I can provide overly detailed daily reports or just occasional updates on "exceptions". Call any time to ask how things are going.
Leaving no trace
(excerpted from the Burning Man Principles)
...We are committed to leaving no physical trace of our activities wherever we gather. We clean up after ourselves and endeavor, whenever possible, to leave such places in a better state than when we found them.
The money
My goal is for you to pay me enough that it shows that you respect what I am doing, but not so much that you resent the amount it's costing. (Most of my editing and computer clients name their own fees as well, and it seems to work fine.) Animal-sitting clients sometimes pay me "what it would cost to board the most expensive animal" minus a ~40% discount and then the other animals are free; thank you Allan for originally suggesting this pricing method. [numad: for most clients this paragraph is only the beginning of a potentially lengthy process of working out a price that feels good. I seem to enjoy discussing money more than most other people I know.]