Thursday, I slept in, after getting up at six or earlier for the last two weeks I figured it would be okay.
I bought a hop on, hop off bus tour ticket, it was good for 24 hours and the routes include all the major attractions. You also get earbuds so you can follow along with a commentary of what you are seeing and the history of what you are seeing. Many of the museums and galleries don't charge any entrance fees, they are free to the public. I visited the British Museum, that took most of the afternoon and I could have spent more time there. In the entry you could create a small mosaic that would be added to a larger design to be added to the museum.