Reminding yourself throughout the day to relax and take some breaths, can help ground you and reminds you that it's not big deal people are doing their own thing and probably barely even hear their surroundings. On a funny note, I once wore a cute dress inside out and backwards and I only noticed when at the restroom mirror later, no one said anything and I bet no one even noticed how goofy it looked. That was eye opening that people are just going about their day really not focusing on much besides their own life