I did take a walk. When I'm walking alone I like to have a destination in mind, so I ended up walking over to the nearby Value Village. I find second hand shopping pretty therapeutic - especially when I'm alone and can really take my time. I found a few great little things, but not so much that I felt guilty buying a bunch of junk that I don't need, so it was the perfect little pick-me-up.
I got some groceries on the way home from VV and made myself a big bowl of my favourite comfort food pasta (this recipe on Orangette but with arugula added: yum!). In the end, they day wasn't so bad. I never did do anything very practical, just indulged in some unnecessary shopping and ate some rich food, but if you're going to have a lazy day, you might as well really try to enjoy it right?
This little octopus book was one of the treasures I found. It has fantastic illustrations and a great story - very detailed descriptions and a simple narrative style. I especially love the last paragraph on the last page (the last picture below).