Peace I leave with you; my peace I give you. I do not give to you as the world gives. Do not let your hearts be troubled and do not be afraid. John 14:27
Very rarely do I get frustrated like I did a years ago but it does happen occasionally. A tech support line that couldn't offer help recently challenged my peace. Perhaps you can identify something that tests you and pushes you to wanting to explode.
Once again it is back to the basics of being at peace and not letting things of this world bother you. When you do, you can end up angry and frustrated which aren't fruits of the Spirit. Being a believer doesn't mean you are never going to get upset but it is learning how to control being upset and then blowing it off. Especially in public remember you are to represent Jesus. Keep that in mind.
So whatever it is that is bothering you remember that the more you get God's word into your heart the more Christlike your responses are going to be.
PRAYER: I love you Lord and I am sorry for when I blow it and need to regroup. I choose to not allow problems and manmade things bring me down. In Jesus' name. Amen.