Work expands to fill the time available.
Now I've got a short contract, and as far as time goes, I feel about the same way. It's amazing how much time you can waste without noticing.
Anyhow, I added another "extracurricular" to my schedule - a band that meets about every two weeks for rehearsal. We've had three rehearsals so far, and I think we're going to sound good with a bit more practise. The guy who started the band has never been in a band with horns before, and expressed surprise when he found out why there are supposed to be 3 (or more) trumpets (or multiples of any of the instruments) - they each play one note in the chord. I could see on his face that something clicked when he realized that - he's a keyboard player and usually performs with your typical guitar/base/drums/keyboard/singer kind of group, so he's used to all the instruments being able to play entire chords at once.
But oh, my cheeks hurt at the end of the rehearsals... I hadn't pulled out my saxophone in a few years before I joined this band, so those muscles were way out of shape. They're getting better pretty quickly, though - I'm not leaking air out the sides at the end of the rehearsal anymore. The muscle remembers what it's supposed to do... it just didn't have the strength to tighten up properly :-)