Anyone whose ever been exposed to any art class in American has gone through impressionism, yet our appreciation for it does not wane. Impressionism uses bright colors, doesn't require a lot of time or planning. You can only paint what you can get in the light your in, which usually changes in about an hour. No wonder why so many Americans appreciate it. It's like our hamburgers. We want them drenched in color and soon! Impressionism fulfills the craving our eyes have for color. Some people even argue impressionism is closer to real-life than photography.
STEP 1 - Gesso your canvas.
STEP 2 - Lightly outline your subject.
STEP 3 - Mix tempera, acrylic, or oil and turpentine and dab them on in strokes. Do all of this in the hour of day and sunshine that bring out the best and most beautiful colors in your subject. Impressionism isn't about drab colors. Never use straight black out of the tube, rather use darker shades of blue mixed with complementary orange.
STEP 4 - Dry, and view.