New chain and cassette on the Audax bike. Cleaned all the bits I normally miss (like rear derailleur areas that you can't get to easily when it's got a wheel and chain fitted).
New brake blocks all round, spent some time making sure they are set correctly (rather than my usual "ooh, they look a bit low, better slide in new pads as I'm heading out of the door now").
Got around to remaking the connections to my rear dynamo light that has been a bit intermittent for a few weeks.