From turpsbanana.com/back-issues, thanks to @Ashli, I found some sense and humor for the day. Quoted, because their page links are not accurate enough for sharing:
"Since 1972 I have produced three to five gouaches a day. I have principles connected with this new medium:
1. Never rub out or attempt to erase. Work round it if you have made a mistake. Make of your mistakes a strength rather than a weakness.
2. Wait for it. That is , if you don't get a clear message, do nothing.
3. If you have a full brush and you have made a mark, do not think that you have to use the paint on your brush - wash it out.
4.As in life, it is not so much what you put in but what you leave out that counts.
5. Paint as if you were painting a wall (Bissiere).
6. No colour stands alone. They are all influenced by each other. This is when the dicey part comes in. I mean the balancing act.
7. Most pictures can be pulled round. If you run into head winds, tear it up.
8. Don't drink and smoke so much & lay off the nudes. Nice, but too easy a gambit."
Roger Hilton, from The Figured Language of Thought by Andrew Lambirth, published by Thames and Hudson, 2007."