Here are my favorites, mostly from this board.
"I wake up each day with nothing to do and at night, fall asleep having only accomplished half of it."
Then the slight variation, I use this one all the time.
"I wake up each day with nothing planned and at night, fall asleep having only accomplished half of it and I’m OK with that."
"The time you enjoy wasting is not wasted time."
- Bertrand Russell
"When I'm bored, I never think 'I wish I was at work“
Money frees you from doing things you dislike. Since I dislike doing nearly everything, money is handy.
- Groucho Marx