Ever find yourself with a big puddle of paint or water on your paper and not sure what to do? No worries - grab a paper towel! Just let it gently touch the puddle, and it'll soak up the excess paint in no time. Made a mistake? Dab the spot with a towel to lift off the paint without spreading it around. If the paint's already dry, add a touch of water before dabbing. This trick may not erase the paint entirely, but it can lighten it enough to make it less noticeable.
This tip is from my Watercolor Bite-Size Tips series.