I would plan a few things do do that you like, perhaps meet up with someone for coffee or just do some window shopping. just to break the time up a bit and give it some structure.
Not much else to suggest I am just getting used to my kids spending time away at their dads with OW, is weird, but I am used to not always having them in the house as they stay at their Grans a lot anyway. I have a partner now so I stayed at his when they were away, even though he was working it felt better then sitting in my house on my own.
Just thiking of you really and hope you can make use of the time either to get stuff done or pamper yourself.