Style Tiles. UI Kick off

Hey, designers 👋

Let's have a chat 😉 The beginning of new projects are always so thrilling and exciting — new challenges, new solutions, new opportunities. And all this should have a proper start to have a successful end game. For today's talk, I'd like to hear your thoughts on how you start your UI stage. I'm approaching this aspect of design withing style tiles. The sample one is illustrated in this shot. This is a style tiles I've just created for my current project.
So it's kinda raw to review.

And what about you?

What is your UI kick off? Is there are anyone using style tiles for defining feel and mood of an upcoming web project? Are you using moodboards? Maybe something else?