I want you to picture a clock.  Practice picturing a clock in your mind and then averting your eyes to the exact opposite position on the clock.  For example, picture the number 12, then avert your eyes clockwise to 6.

When a woman who may be a challenge to not lust after crosses your path, use this idea to avert your eyes.  Find something at this new eye position to look at long enough to get your thoughts squared or have a new plan if she is in the same environment as you.