Using equipment properly is often a factor of time and then , often, having someone who knows about these things explain them to you clearly and effectively. Heather Thomas is good because she understands what she is talking about, can explain the whys and then can show you well how to get the best out of quilting rulers. All that in 6 minutes. I have made the mistake of cutting the wrong size strips because I haven't paid attention. I have also found that using the rulers properly saves time and energy. If you have invested in good tools, spend a few minutes finding out how to get the best out of them. In the end it makes your life easier.