Don't live worried, frustrated or upset because of what somebody did or what didn't work out. Come back to a place of peace. It's not going to work against you; it's going to work for you.
When you're tempted to be upset, ask yourself 'Is this worth giving up my joy?'
When you allow what someone says or does to upset you, you're allowing them to control you.
Next time you're tempted to be upset, frustrated, offended, remind yourself, it's a part of that ten percent of things in life that you can't control - but you can control how you respond.
It’s better to please God and have a few people upset with you than to please people and have God upset with you.