burning the midnight oil
So I finally started writing my book after much procrastination. I have to say, I'm loving it. I've always been nocturnal, me, but society has forced me into the daylight over the years. I found myself pleasurably working deep into the night such that I had to actively instruct myself to go to bed. Were it not for the dentist appointment in the morning, I may well have stayed up all night like the good old days.
And yes, that's a blue yeti.