There are many ways to check out spiritual practice. One of them is to check how fast we are able to let go of negative emotions that arise daily like disappointment, anger, jealousy etc. If we are students of the Dharma for long, we should already notice a difference and people around us would have noticed this and feedback to us or be inspired by our practice.
This leads to the next yardstick. How many people, particularly those who are close to us, are inspired to practice the Dharma or inspire those who are practicing the Dharma to do even more. This is not an easy yardstick for people but if we really want to practice the Dharma, it is one of the best. Frankly, I inspire very little people to the Dharma although I have been in it for years.
The other yardstick is how much do we contribute back to the organisation or center that we have received the Dharma from. If we have received so much benefit from the teachings of a particular Dharma center or Lama, we should contribute time, effort or even money back to the center. If we have given very little back, it shows where our practice is.