In his new book, Trading In The Zone, Mark Douglas convincingly and clearly outlines a basic trinity of attitudes necessary to be a successful trader. A trader needs to accept loss. A trader needs to think in terms of over all probabilities. Now I know my suggestion to imagine the successful conclusion of a trade appears to fly in the face of these truths. Successful traders accept and expect losses.
Losses are endemic to trading.
Losses are a simple cost of doing business just as inventory is an acceptable cost to a merchant. Of course not. The consistently successful trader accepts deep in her heart, deep in her bones, that her winnings will be tempered with inevitable losses. She also anticipates her ultimate triumph because she's structured the probabilities in her favor. She takes the long view.