You can create a monthly chart
horizontally : days 30 days
vertically: vision quality (1 - 10) (absolute sacle or relative to your own standards and experience? we'll come to that later)
Every day at the same time, use the measurement technique you choose and simply ad the value to your chart.
This will keep you focus on your progree and show you the exact impact that your eye training exercise has on your vision.
I'll come back later to describe exactly what to measure and how to measure it.