You can't just wake up one morning and say, "I'm not going to be impatient anymore!" Yes, you are. And you actually help yourself by acknowledging that a bad habit like that won't be solved immediately!
Instead, set the goal to be more patient during your team meeting that happens every morning.
Use that as an isolated practice space and subconscious reminder of what it is you want to practice.
Focus on that for a few weeks, and then go from there.
- Derived from an article titled "7 Steps to Transforming Yourself From Who You Are to Who You Want to Be" by Nicolas Cole