1. Tuck the bed sheets in. At least under the end of the bed. On the side as well if the cover is wide enough. It's something people never bother to do at home, takes 30 seconds and gives it a bit more of the hotel/i just made the bed brand new for you feel, and it gets rid of a bunch of creases if you don't iron the sheets
2. Open a window. before a guest arrives! (shut it again if you need to because of the cold later) but it's amazing how many smells you don't notice because you're used to them that a guest picks up as soon as they arrive. THEN add the extra smell of your cookies, flowers, ect AFTER the air has been cleared. Layering a whole bunch of smells just makes it seam like you're hiding somthing. And after the guest has been in the home a bit they won't notice the other smells as they creep back in, but on arrival your dog/ last nights cooking/ the shower from the morning/ are all super noticable to a guest.
3. shake out you bathmat so it's got a fresh plumped up feel, rather than a slightly trodden look. This is totally random but even though your bathroom is sparkly clean and you swept and mopped, when you put the bathmat back down lookin weary it spoils the affect.
4. yes de-clutter, sorry but you might love the flower vase with funky patters, but if it's got no flowers it's a bit redundant and its irreplaceable if a guest breaks it.
5. Match it, or hide it. If you want to add cute little pillows extra on the bed, fine but try and match them to something else in the room, curtains, chair, doesn't matter, but if it's nothing then it probably goes back 4. and you should just de-clutter it.
6. Matching towels, if you have 2 people staying, give them the same colour towels. Yes i know when you use them it's harder to know whose is whose, but getting a blue towel and a red towel makes me feel like i'm staying at my brothers and he gave me whatever he could find. And yes fold them, again at home you fold in half, the half again and just keep going untill it's small right? fold it in 3, creases on the inside, or roll it, (or whatever way you want to go with) but it's something like tucking the bed in. It's fresh and new for you, (yay), something you don't do at home, and it takes 30 seconds.
There's nothing cleaning related here, because i'm assuming that cleaning the bathroom properly, the floor, and the dusting ect are all just norms..