Conversely, keeping the pipeline full while engaged on other projects. This applies especially if you are booking in one-month blocks. How do you keep incoming leads hot when you won't be available for at least 60 days?
I'm very upfront about my availability. I also let people know weeks in advance when I will be available. And in between that time I stay visible at my favorite events/meetups and in social media (publishing little open source things), asking questions, etc.