Tip: Do not sound Inflexible

Once we start following strict time management methods, we tend to carry that 'attitude' with us. This sounds strange to people who don't follow any time management and they start developing aversion to it.

For example, one colleague requests you to do something for him. You reply "OK, I will get that on my task list and let you know when I can get to it. Let me look at my schedule and get back to you" This makes your colleague feel that you don't consider his request important and will think twice before coming up with a request to you next time.

Choose your words carefully. How you manage your tasks is your personal style. You are using your task list to track everything you do and prioritize. No one else cares about your task list. To others, it is important whether you can do it or not.

If people start sensing that you are not flexible, then you get branded as a person who operates out of a "schedule" and "task list". When we mention task list we are trying to communicate that we are organized and we will work on it without forgetting it.

Instead of conveying on how you are operating, you just need to convey "I will work on it as soon as possible and let you know". Then go to your task list and prioritize accordingly.
This also has another impact on others. It makes others who are not following similar methods feel different. They may interpret your words that you are trying to convey others are not working in organized manner. Since everyone has their own way of getting organized, this tends alienate others.

This is one more negative aspect of following time management tools.

Link: Negative effects of time management