mosaicwarts, I hope your agent is ringing you after she has feedback on every single viewing. All the feedbacks helped me a little bit, psychologically. I would not worry about the packed boxes, just stay clean, the windows, showers, kitchen. Packed boxes were fine when I had viewings. It might be easier for you if you could dedicate a complete bedroom to your packing, put everything in there. Boxes in a room would not put off any serious viewer
I liked 3 days notice for a viewing just because I could do the sparkle clean at my own pace and me too, I hopped from viewing to viewing. The EA did all the viewings, I went out and had a small meal, making it a treat to come back to a very clean house and then I waited, for the phone call from the EA, then I went back to normal living, until the next viewing. It was a horrible time overall, life stands still
Re the garden rubbish, doing what you are doing will help. Try and keep it contained in a corner if possible