There was a time when I worked at a call center, and we had a meeting. The supervisor straight off the top started telling us that we were doing great and that if we used the system, he came up with it would improve our performance. I was one of the people who was not using his exact system, I was able to take what was useful from his system and make it work for me, so I was able to do my job comfortably for me to be able to be successful in providing an accurate job. I raised my hand and explained to him my thoughts, it was clear that I wasn't questioning him or his system but expressing what works for him might not work for someone else. The next meeting we had he started his speech with Take what you need from my system to come up with one that works for you. It made me feel good about speaking up and being assertive.