Think about who your house would appeal to.
Decide who you don't want eg Stag/Hen etc.
If it's just me, my Sister/her/our friends, WiFi is a must.
If it's with my Grandchildren, I want a DVD player or ability to get YouTube on the telly.
Most groups want WiFi, but you're arranging that.
If your undergoing treatment/staying with someone who is, you want a Smart Telly, at least, but also a DVD player, for distraction.
Washing up/cleaning stuff, is always welcome. Big bags/carrier bags. I've been delighted to find kitkats/club type biscuits. When I've stayed in Scotland they've left traditional morning rolls. So something local is a nice touch.
Umberellas! Lightweight fleece type throws, for putting around my shoulders, because a dressing gown is too bulky to take.
Be prepared to take rubbish to the tip. That's been the main complaint by people that I know living by rentals. Renting out your house artificially increases the population, in ordinary streets. Does your Bin Collection now come under business, or will guests put the bin out/in?
Explain the area, bus routes, distance from train station etc. Shops/businesses. Facilities, parking. What it's close to. If its on the outskirts of anywhere major. For instance, many people stay in Kirkby/St Helens, to get into Liverpool, when an event is on.