I wrote earlier about tips for hotels and AirBNBs naming things like desk space, amenities, good illumination and more, but let me add some things I would like to see in every unit (and listing) for AirBNB hosts, not all of which apply to hotels.
Universal power strips
So many places don't have enough plugs for the modern electronics-laden technomad. So get some power strips. In particular, get the ones that have universal sockets which take US, Euro, UK and Aus/China plugs. Yes, I bring adapters but it's always nice to have some extra plugs. Put one of these power strips by the bed (especially if the plugs by the bed are occupied by lamps and other things.) Put one by the desk space -- you do have desk space, right?
Select your main photo well
What is the most important feature of your unit? Most of the time it's the view or the location, though also high on the list are its internal quality (fancy and new vs. older and plain,) the living space or the kitchen. But while everybody wants a place with a nice kitchen, living room and bed, few are shopping primarily on that.
Pick the most important feature and make it your main photo. Possibly combine two photos for that main photo. However, if you choose to show the view, make it a realistic photo or include one after. If you show the location by showing a nearby sight, put text in the photo saying "Near to this" or similar.
When I shop for properties, that main photo should grab me. If I'm looking for a view, that's probably what you want to show me. On the other hand, while location is important to me, AirBNB is already showing me that. Having a picture of the famous local landmark is pointless, unless you can see it out your window.
It is important that your photos be realistic. Many are tempted to photograph things to make them look bigger than they are, or to hide something. Don't do it. People will be disappointed and leave you bad reviews, which is worse than an unflattering photo. Yes, your "competitors" are using misleading photos but in the end they will pay for that.
This is particularly true when photographing the view. Don't take a small view only visible if you lean out on the terrace and crop it to make it seem like the view from the property. If your view is only from the terrace, use a wide angle to make it clear you're standing on that. If the view is inside, take some photos inside of the window, showing what you will see walking around the room that has the view. Photos of rooms should not be super wide angle (that makes the room look bigger than it is) but photos of the view often should be.
If you include photos of nearby things, like the town's main tourist site to show that you are near it, mark these photos as "Not from the home, 200m away" or similar.
You should show your "view" even if you have no view. People should know if the unit looks out on a courtyard or back street, and what it looks like. You may be surprised -- even a quiet back street may be exotic to the tourist.
When shooting inside including the windows and view, use a camera with an "HDR" mode (most phones do this now) or get some HDR software so your photo can show the inside and outside at the same time. And seriously, no crappy, blurry photos. I know you're not a professional photographer but today's devices make it easy to get a good shot if you hold reasonably still. You're trying to make serious money -- borrow a friend or their camera if you have to.
Throw in photos of the amenities I describe below, if you have them, to let people know they are there.
If you rent your place for longer-term tenants, consider a photo of a floor plan, if you have one, or sketch one if you can. When renting for more than a week, this is very handy.
Talk about the flights of stairs
Many AirBNB users are older and don't want a unit where they have to walk up 4 flights of stairs, or even 1 in the case of those with a mobility problem. AirBNB lets you say "elevator in building." which is good, but it should really be "Elevator in Building OR unit is on ground floor" -- and I think that people should actually check that box for ground floor units until AirBNB fixes that. Of course be clear in the listing on that, or on how many floors the guest will need to climb, and whether there will be assist for luggage.