How to find clients?

I’m looking for tips on starting client work in photography (with a bit of video on the side).

For those of you with experience, what are some important things I should consider when working with clients for the first time? For example, how do you set expectations, communicate effectively, or handle contracts and pricing? Are there any common mistakes I should avoid or best practices to follow?

I’d love to hear your advice, insights, or even personal experiences. Everything is appreciated, as I want to make sure I start off on the right foot!