Ruining a page on purpose so you stop caring
Okay, so we've talked supplies, we've talked paper, we've talked taping. You've got a pad of cheap stuff sitting there taped down or clipped down or held with washi tape, whatever you landed on.
Before we mix a single color for real, we're going to ruin a page.
On purpose. Right now.
I do this with every class I teach and I'll keep doing it because it works. Here's the problem it solves: if the first mark you ever make on watercolor paper is one you're trying to make good, you'll white-knuckle the brush the whole time. You'll hesitate. Hesitation is the thing that actually ruins watercolor, way more than too much water or the wrong color. So we're getting the precious feeling out of the way before it starts.
The exercise
Load your round brush with way too much water and whatever color's closest. Don't think about it. Don't pick a "nice" color, just grab one.
Drag it across the page in a big loose swoop. Let it puddle in one spot. Tilt the paper so the puddle runs somewhere you didn't plan. Drop a second color into the wet puddle and watch them fight it out.
Now, while it's still wet, do something dumb to it. Flick water at it. Press a paper towel into part of it. Drag a dry brush through the middle. Sprinkle salt on a corner if you've got some (I always keep a jar of coarse salt in my kit now, long story, learned that lesson the expensive way with an entire sky that ended up looking like a snowstorm).
Then walk away from it. Go get a glass of water, check your phone, whatever. Let it do its thing without you hovering.
Why this actually teaches you something
While that page is drying you're going to see, in real time, how fast pigment moves in wet paint and how it stops moving the second things dry. That's the whole game of watercolor right there. You're not controlling it, you're timing it. This page has zero stakes so you can actually watch what's happening instead of panicking about whether it's "working."
This is also where I'll say the thing I say to every beginner class: mud is fine. Actually, mud is useful. Everybody gets nervous the first time two colors mix into a muddy brown-gray blob they didn't intend, like they've broken something. You haven't. That mud is a real color that shows up constantly in nature, especially around here. The foothills in late summer are basically that exact gray-brown. I know this because my son Leonardo, three years old at the time, got into my palette while I wasn't looking and mixed every single pan into one puddle of gray-brown sludge. I was annoyed for about ten seconds. Then I looked at it and thought, huh, that's the hillside behind our house in August. I use that mud on purpose now. Learn what makes it so you can make it when you want it, not just panic when it happens by accident.
A real story about letting go of control
I left a wet painting sitting on the kitchen counter once, still glistening, thinking it was fine there for a minute. My daughter Paisley walked by and set her sippy cup right down in the middle of it. I saw it happen and had that half-second of horror.
It dried into this soft perfect ring, lighter in the middle, feathered at the edge. I liked the painting better with the ring in it than without. It's still taped to my fridge, actually, held up with a pizza place magnet, which in my house is the highest honor a painting can get.
I tell you that because the ruined-on-purpose page you just made is doing the same job that sippy cup accidentally did. It's proof that the accidents aren't always the enemy. Sometimes they're just information about how the paint behaves, and once in a while they're better than what you were trying to do anyway.
What to do with your ruined page
Nothing. Let it dry flat, don't tape it up, don't frame it, don't even really look at it that hard. Its job is done. Its job was making you touch water to paper without caring what came out.
If you want, keep it in your pad as a reference for "here's what happens when I use too much water" or "here's what salt actually does." Mine are full of test pages like that. I still refer back to them.
Before next time: ruin one more page at home, on your own, no instructions this time. See what you remember from today without me standing over your shoulder.