The sticky notes really work.
On the bathroom mirror, on the refrigerator, above the computer, next to the light by the bed, above the spot where I make coffee. It just takes having alternate words to put in my head other than the negative ones. Poetry is good to memorize, too. When I get into some morose mood, reciting a long poem helps to put the right words in my head, words that are orderly and not random firings from the ego.