For some people, a mental checklist at the end of each day works well. Many people benefit even more by keeping a small chart handy. In this way, you can view your progress over time.
Below is a sample chart for your spiritual log. Of course, you can create your own chart to reflect your own goals.
Place a "check" for times you were successful in controlling your eyes; place a "minus sign" when you did not exercise control.
Today: Take a few minutes in the evening to review your conduct of that day.