How much should you sit zazen? Eight hours every day? Half-an-hour a day? Aim for some zazen every day -- even if it's just 10 minutes. Do more if and when it feels right. Orient toward your intention and don't worry.
Badger asked, "Do you think it is important to sit up all night when we feel especially deep in the practice?"
Raven said, "Blackberries ripen in August."
Badger said, "We shouldn't push it?"
Raven said, "Let it push you."