How do you deal with inconsistency in clients which leads to inconsistency in income?

I graduated just a few months ago and then started in a private practice. So far it’s pretty steady growth and I’m at about 10 clients right now, but surprisingly this week seven of them canceled for the week. This kind of opened my eyes to how unexpected this can be, although I do understand the holidays can get crazy. I respect allowing the clients to come to therapy when they feel like, but what are some of you guys doing for reliable income? Can that even be a thing with only doing private practice?